The best fire glass, compared.
Top pick: Teamson Home blue mirror fire glass, 4 kg Best value: Teamson Home blue mirror – About £19.99, £5 below the red bag of the same stated size, beside a copied review block. Updated 22.10.2026.
Fireplace glass is loose decorative media for a gas, propane or ethanol feature: crushed shards, diamonds, small rocks or beads. It is not a fuel, not a stove-door pane and not a cleaner. The first check is whether the appliance manual allows glass. Piece size, pack weight and a seller's heat claim are what you can compare. A tempered-glass line, or a line that says the pieces will not crack, does not cancel UK reviews that describe popping, shattering or near-powder pieces. The title says 4 kg and the weight field says 1 kg. How the manual, the fuel and the kilograms decide the bag is set out in the [fireplace glass buying guide](/hub/fireplaces-and-stoves/fireplace-glass/sub/fireplace-glass-buying-guide). Is a glass-ceramic viewing panel, rated up to 760 °C on the manufacturer page, and it is not a bead. An outdoor gas or propane pit is in scope only when the manual allows loose media. An indoor gas fire's fuel bed is part of the type approval. If you are choosing the pit itself, start with the [outdoor gas fireplace comparison](/hub/fireplaces-and-stoves/outdoor-gas-fireplace). The listing says no sharp edges and that the glass replaces wood. Teamson small rocks claim 600 °C and an average 1.3 cm.
Fireplace glass is loose decorative media for a gas, propane or ethanol feature: crushed shards, diamonds, small rocks or beads. It is not a fuel, not a stove-door pane and not a cleaner.
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Personal buying guide
Question 1 of 2
What are you filling?
The Teamson Home blue bag, model PT-FG0002, is the same 1.3 cm tempered rock with a mirrored backing, listed for outdoor garden propane gas fire pits at £19.99. The page claims heat resistance up to 600 °C and tells you to rinse with vinegar and water, which is a cold rinse rather than a clean while the glass is hot. The star line reads 4.6 from 227 reviews, and that block is the same text as the red listing, including complaints about red grit, so those comments are not a separate blue test. The warranty line is 30 days for manufacturer defects, shorter than the 12 months on the clear and red bags. Against the red bag at £24.99 it is the cheaper mirror colour in this set, which is why it carries the best-value mark, and that mark does not repair the duplicated reviews. The saved listing asks about a wood fire and does not answer yes. Choose it when you already want a blue mirror look on a propane pit the manual allows.
Pros
Cons
Best for: You want a blue mirror look on a propane pit that already allows glass, and you can live with a copied review file.
Less suitable: You are choosing by a review count you think belongs only to the blue colour, or you wanted the red pieces and a 12-month warranty.
Specifications
Common questions
Is the blue glass different from the red bag?
The blue listing names a mirrored backing, model PT-FG0002, a 4 kg bag and a 600 °C claim. The price on this saved listing is £19.99. The red listing is model PT-FG0004 at £24.99. The review text in the blue saved listing is the same block as the red file, including complaints about red grit, so those comments are not a separate blue test.
Does the listing allow a wood fire?
The saved listing includes the question and does not answer yes. The bullet says outdoor garden propane gas fire pits, plus aquariums and landscaping.
How do you clean it?
The listing says rinse with vinegar and water. It does not describe a detergent, a dishwasher or cleaning while the glass is hot.
The Teamson Home red bag, model PT-FG0004, is the same 1.3 cm tempered rock as the clear bag, 4 kg, listed to 600 °C for outdoor garden gas fire pits, at £24.99. Across 4.6 from 227 amazon.co.uk reviews it has the star line that the blue file copies, and those texts discuss this red colour, including red grit. UK reviews say the pieces look red in daylight and turn black, or lose their colour, once the fire is lit, including on a table fire pit and around a bio-flame, though one buyer who mixed two colours said they did not discolour. One UK review of a gas fire pit built into a table says the glass exploded for the first few uses and then settled; other reviews say these pieces do not spit the way damp lava rocks did. A UK review calls them dusty, with some sharp edges, and advises a wash before use. The listing claims they will not break, which that first-light popping does not support as a promise. At £5 more than the blue bag it is the dearer colour of the same Teamson size.
Pros
Cons
Best for: You want red glass in daylight on a gas pit the manual allows, and you accept that reviews say the colour can look black in the flame.
Less suitable: You need the colour to stay red once the fire is lit, or you wanted the lower price of the clear bag.
Specifications
Common questions
Does the red stay red in the flame?
Not for every reviewer. UK reviews say the pieces look red in daylight and turn black, or lose their colour, once the fire is lit, including on a table fire pit and around a bio-flame. Another buyer who mixed two colours said they did not discolour.
Do they pop?
One UK review of a gas fire pit built into a table says glass exploded for the first few uses, then settled. Other reviews say these pieces do not spit the way damp lava rocks did. The listing claims they will not break.
Are the edges smooth?
The listing does not say the red pieces are tumbled smooth. A UK review says they are dusty and that some edges are sharp, and advises a wash before use.
The Teamson Home clear bag, model PT-FG0001, is small polished tempered rocks with an average length of 1.3 cm, listed for outdoor garden gas fire pits at £15.99. Across 4.6 from 159 amazon.co.uk reviews it is the review file that belongs to this colour, unlike the blue listing, which copies the red block. The title and bullets say 4 kg, while a separate item-weight field says 1 kg, so the pack weight is not settled by the page alone. The listing claims heat resistance up to 600 °C and says the pieces will not melt or break; that is the seller's line, and this comparison did not test it. One UK review says the clear pieces went black on the first light-up. The stated use is gas pits, propane pits, aquariums and landscaping, and the saved listing does not answer yes to a wood fire. It is the top pick in this set when your pit manual allows loose glass and you want the lower Teamson price with its own review count.
Pros
Cons
Best for: You have an outdoor gas fire-pit table whose manual allows loose glass, and you want clear pieces at the lower Teamson price.
Less suitable: A wood-burning pit, an indoor coal bed, or an order that needs one agreed pack weight on both lines of the listing.
Specifications
Common questions
What temperature does this listing claim?
The Teamson clear listing says safety tempered glass with fire and heat resistance up to 600 °C, and that the pieces will not melt or break when burned at high temperatures. That is the seller's claim. The saved listing has no independent test.
Can you put it on a wood-burning fire pit?
The saved listing asks the question and does not record a yes. The stated use is outdoor garden gas fire pits, propane pits, aquariums and landscaping. One UK review says the clear pieces went black on the first light-up.
How much is in the bag?
The title and bullets say 4 kg, about 9 lb, with an average piece length of 1.3 cm. A separate item-weight field says 1 kg. Both figures are on the listing, so the pack weight is not settled by the saved listing alone.
The yarlung diamonds, model Ya-FireGlassDiamonds-3C-10lbs, are about 2.5 cm across in Caribbean blue, cobalt blue and crystal ice, 4.5 kg (the table says 4.52 kg) at £14.99. That is about £3.33 per stated kilogram, the lowest unit price in this set, with 4.5 from 76 amazon.co.uk reviews. The listing says the edges are not sharp, that the glass will not crack, and that it replaces traditional burning wood. Two United Kingdom reviews say the diamonds exploded in a fire pit and call them dangerous. A Canadian review says they cracked over one season in a gas fire pit, and US reviews repeat sudden shattering. There is no Celsius figure, only a high-temperature claim. The low price does not cancel those breakage reports, so this row is not the bargain fill even though the kilogram price is the lowest here.
Pros
Cons
Best for: You have read the shatter reviews, your pit manual still allows this glass, and you want the larger diamond size.
Less suitable: You wanted the cheapest bag on the assumption that a low price means the pieces stay whole.
Specifications
Common questions
Did UK reviewers report breakage?
Yes. Two United Kingdom reviews say the diamonds exploded in a fire pit and call them dangerous. A Canadian review says they cracked over one season in a gas fire pit, and US reviews repeat sudden shattering. The listing still says they will not crack.
What colours are in the bag?
The listing says three colours: Caribbean Blue Luster, Cobalt Blue and Crystal Ice, about 2.5 cm across, with no sharp edges claimed.
Is this a wood fuel?
The listing says the glass is for a fire pit and describes it as replacing traditional burning wood. It is glass media, not a fuel, and the saved listing has no wood-fire temperature.
Hiland's amber bag, model RGLASS-AMB, is 10 lb (4.54 kg) of polished crushed glass at £23.85, listed for natural gas or propane. Across 4.4 from 316 amazon.co.uk reviews it has the largest review count in this set, and UK texts repeatedly say the pieces are very small, including almost powder, and smaller than the photograph. Some buyers returned them for that reason, while one UK review still used the small pieces under larger reflective coals. The listing gives no Celsius figure; it only says the heat rating is higher than logs, lava rocks and stones, and one US review says pieces melted. The bullets do not tell you to wash it, yet UK reviews say the bag arrived dusty and that a soapy wash made it sparkle, and one UK review says wear gloves. A printed size of 19 × 19 × 19 mm sits on the technical line and is not a coverage area. It suits a small gas pit if you have already accepted very small pieces.
Pros
Cons
Best for: You are filling gaps under larger coals, or a small gas pit, and you have accepted that the pieces are much smaller than the photograph.
Less suitable: You wanted rocks around 1.3 cm, or a printed Celsius rating, before you order.
Specifications
Common questions
How big are the pieces?
The listing does not give a piece size. UK reviews call them very small, including almost powder, and some buyers returned them because they looked larger in the advert. One UK review still used the small pieces under larger reflective coals.
Does the listing give a temperature?
No. It says the heat rating is higher than logs, lava rocks and stones. There is no Celsius figure in the saved listing.
Do you need to wash it?
The bullets do not say to wash it. UK reviews say the bag arrived dusty and that a soapy wash made it sparkle. One UK review says wear gloves.
Firebrand Direct's amber beads are a 1 kg title, with the weight field at 1.24 kg, at £15.00, and the title names fire pits, gas fires and ethanol burners. The amazon.co.uk line is 4.4 from 5 reviews, and the saved listing contains three United Kingdom texts, so this is a small sample next to Hiland's 316 and the clear Teamson's 159. One of those UK reviews says the beads were effective on an ethanol fireplace, though smaller and less bright than the picture, and a buyer sent a second box back. Piece size is not stated, and the three texts do not agree on how large the beads are. Tempered glass and heat resistance are claimed without a Celsius figure. Country of origin is listed as the United Kingdom, which is an origin line on the listing. A 1 kg jar is a top-up or a small ethanol burner, not a substitute for a 4 kg pit fill.
Pros
Cons
Best for: You are topping up a small ethanol burner the manual allows, and you do not need a 4 kg fill.
Less suitable: You are covering a gas fire-pit table, or you want a review count in the hundreds before you trust the beads.
Specifications
Common questions
Is this enough for a fire-pit table?
The title is 1 kg, and the weight field says 1.24 kg. The other bags in this comparison are about 4 to 4.5 kg. A UK review used the beads on an ethanol fireplace and sent a second box back. The saved listing does not give a coverage area.
Does it name ethanol?
Yes. The title says fire pits, gas fires and ethanol burners. One of the three UK reviews says they were effective on an ethanol fireplace, though smaller and less bright than the picture.
How many people have reviewed it?
The listing line is 4.4 out of 5 from 5 reviews. The saved listing contains three United Kingdom review texts. That is a small sample next to the Teamson and Hiland counts.
Shelf prices, star ratings and review counts are the figures from the six amazon.co.uk listings, captured on 19 October 2026. The stored score is the star rating multiplied by 20. 4.6 stars is 92, 4.5 is 90 and 4.4 is 88. Review volume, a copied review block, a weight clash and shatter reports are written in the assessment. They are not a second score. Three listings share 92. The top pick is Teamson clear at about £15.99, because it has its own 159 reviews, the lower Teamson price, and the only 600 °C line in the set. The best value is Teamson blue at about £19.99, the cheaper mirror bag beside the red bag at about £24.99, and that mark sits next to the copied-review warning. yarlung is about £3.33 per stated kilogram, and two UK reviews say the diamonds exploded, so the lowest unit price is not the best-value award. This is not a lab test. A heat line, a piece length or a pack weight is the seller's claim.
Amazon star rating
100%The published score is the amazon.co.uk star rating times 20, rounded to a whole number. 4.6 is 92, 4.5 is 90 and 4.4 is 88. A copied review block, a weight clash and shatter reports stay in the product text. They do not change the number. Where three bags share 92, the top pick is the clear Teamson bag on price, its own review file and the only 600 °C line.
Match the appliance and the fuel first, then piece size, then pack weight, then colour in the flame, and only then a temperature claim. A manual that allows loose glass outranks a 600 °C line on the bag. Prefer a review file that belongs to that colour over a star line copied from another listing.
Fireplace glass here is loose decorative media: crushed shards, diamonds, small rocks or beads for a gas, propane or ethanol feature. It is not a fuel, not a stove-door pane and not a cleaner. SCHOTT ROBAX is a glass-ceramic viewing panel, rated up to 760 °C on the manufacturer page, and it is not a bead in this set. An outdoor gas or propane pit is in scope only when the manual allows loose media. An indoor gas fire's fuel bed is part of the type approval. Wood stoves are a different product.
This set is loose media. A stove-door pane and a glass cleaner are different products. SCHOTT ROBAX is a viewing panel, not a bead.
Hiland states no piece size, and UK reviews call the crush very small, including almost powder. Teamson quotes 1.3 cm. yarlung quotes about 2.5 cm. No listing gives a screened minimum and maximum.
Wet media can spall. Only Teamson prints 600 °C, and that line was not tested here. Burying the burner under a whole 4 kg bag is a separate mistake. Follow the manual depth and keep the pilot clear.
The first check is the appliance and the fuel, not the colour of the bag. Outdoor gas or propane pits whose manual allows loose media are in scope. An indoor gas fire's fuel bed is part of the type approval. The Gas Safety (Installation and Use) Regulations 1998 require competence for gas-fitting work and forbid taking a type-approved appliance out of its approval. HSE says domestic gas work is for a Gas Safe engineer competent for that appliance.
Piece size and pack weight are the figures you can compare. No listing gives a screened minimum and maximum. Hiland's amber crush has no stated size, and UK reviews call it very small, including almost powder, and smaller than the photograph. Teamson quotes an average of 1.3 cm, and a review of the red bag says about 1 to 2 cm. yarlung quotes about 2.5 cm across, in three colours. Firebrand's three UK reviews disagree, and the listing states no size. Pack weight splits the set.
Three typical situations, each with a recommendation from this comparison.
You have an outdoor gas or propane pit whose manual allows loose glass, and you want a stated piece size. Teamson Home clear is the top pick at about £15.99: average 1.3 cm, a 600 °C listing line, and 4.6 from 159 reviews on this colour. The title says 4 kg and the weight field says 1 kg.
You want a mirrored blue colour and you can live with a copied review file. Teamson Home blue is the best value at about £19.99, £5 below the red bag, with the same stated 1.3 cm and a 600 °C listing line. The 4.6 from 227 reviews matches the red file, and the warranty is 30 days.
You are topping up a small ethanol burner the manual allows, not covering a fire-pit table. Firebrand Direct amber beads are a 1 kg title at about £15.00, and the title names ethanol burners. The listing is 4.4 from 5 reviews. Five reviews are not a verdict.
The top pick is Teamson Home clear at about £15.99. It is the 1.3 cm bag with a 600 °C listing line and 4.6 from 159 reviews that belong to this colour, and the title weight and the item-weight field do not agree. The best value is Teamson blue mirror at about £19.99, £5 below the red bag, with a review block copied from the red file and a 30-day defect warranty. yarlung is the lowest price per kilogram, and two UK reviews say those diamonds exploded, so it is not the best-value bag. Loose glass is only for an appliance whose manual allows it.
Teamson Home blue mirror
About £19.99, £5 below the red bag of the same stated size, beside a copied review block.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public UK sources used for this comparison. amazon.co.uk prices, stars and review counts were taken from the listings on 19 October 2026.
This page contains affiliate links to amazon.co.uk (tag pcuk26-21). If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts are from the listings. This is not a laboratory test.
