Molten glass

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Molten glass detail.png

Molten glass is used in the Crafting and Construction skills, as well as some quests, to form glass items. It is created through the Crafting skill by using a bucket of sand and soda ash on a furnace, granting 20 Crafting experience. This only requires level 1 Crafting. Alternatively, players can use the Lunar spell Superglass Make, which combines all buckets of sand and all seaweed or soda ash in the player's inventory into molten glass, granting 10 Crafting experience per pair of items.

Molten glass is used in some quests such as Observatory Quest, Horror from the Deep, Wanted!, Desert Treasure, Another Slice of H.A.M. and The Fremennik Exiles. Although you can't buy molten glass at any shop in the game, you can still buy buckets of sand and soda ash from the charter ship shops. This is especially useful for ironmen, who could buy both items and then smelt them in a furnace.

Uses - Comparing Molten Glass yield and XP[edit | edit source]

When using soda ash and buckets of sand in a furnace the molten glass yield is

1.0 molten glass per soda ash and bucket of sand.

When using Superglass Make with soda ash and buckets of sand the molten glass yield is

1.3 molten glass per soda ash and bucket of sand.

When used on a fire, giant seaweed turns into six soda ash upon successfully cooking, rather than just one given by normal seaweed. You can however fail, resulting in only one soda ash. Note that Cooking gauntlets do not decrease the cooking fail chance, however the Hosidius Kitchen cooking range effect still applies.

When used in conjunction with the Superglass Make spell, giant seaweed similarly acts as six regular seaweed and gives 60 Crafting experience per seaweed when cast. The combination of two giant seaweed and 12 buckets of sand yields on average 1.45 molten glass per bucket of sand, while the combination of three giant seaweed and 18 buckets of sand yields an average of 1.6 glass per sand, although with the latter some of the glass will fall on the floor as it overflows from the inventory. If it is not picked up, it results in an average of 1.488 glass per sand. If players obtain the sand via mining sandstone, it is slightly more efficient to not pick up the excess despite the lower return due to how quickly the materials can be obtained.

The average Crafting experience per giant seaweed varies:

  • For an average of 1.45 glass per sand (two giant seaweed and 12 buckets of sand), each giant seaweed equals 538.5 experience when making lantern lenses or 669 experience when making empty light orbs;
  • For an average of 1.488 glass per sand (three giant seaweed and 18 buckets of sand without picking up the excess), each giant seaweed equals 551 experience when making lantern lenses or 685 experience when making empty light orbs;
  • For an average of 1.6 glass per sand (three giant seaweed and 18 buckets of sand and picking up the excess), each giant seaweed equals 588 experience when making lantern lenses or 732 experience when making empty light orbs.

These numbers include the experience from casting Superglass Make.

Creation[edit | edit source]

Furnace[edit | edit source]

Requirements
SkillLevelXP
Crafting Crafting120
Members
Member icon.png
Ticks2 (1.2s)
ToolsNoneFacilitiesFurnace icon.png Furnace
Materials
ItemQuantityCost
Bucket of sand.pngBucket of sand137
Soda ash.pngSoda ash141
Total Cost78
Molten glass.pngMolten glass1117
Profit39

Superglass Make[edit | edit source]

Due to the random nature of the Superglass Make spell, the displayed output quantities are averages.

Requirements
SkillLevelXP
Crafting Crafting61 (b)180
Magic Magic77 (b)78
Quest points Requires completion of Lunar Diplomacy
Members
Member icon.png
Ticks6 (3.6s)
Materials
ItemQuantityCost
Bucket of sand.pngBucket of sand18666
Giant seaweed.pngGiant seaweed3591
Astral rune.pngAstral rune2292
Fire rune.pngFire rune630
Air rune.pngAir rune1050
Total Cost1,629
Molten glass.pngMolten glass28.8[r 1]3,369.6
Profit1,740.6
  1. On average

Requirements
SkillLevelXP
Crafting Crafting61 (b)130
Magic Magic77 (b)78
Quest points Requires completion of Lunar Diplomacy
Members
Member icon.png
Ticks6 (3.6s)
Materials
ItemQuantityCost
Bucket of sand.pngBucket of sand13481
Seaweed.pngSeaweed13273
Astral rune.pngAstral rune2292
Fire rune.pngFire rune630
Air rune.pngAir rune1050
Total Cost1,126
Molten glass.pngMolten glass16.9[r 1]1,977.3
Profit851.3
  1. On average

Requirements
SkillLevelXP
Crafting Crafting61 (b)130
Magic Magic77 (b)78
Quest points Requires completion of Lunar Diplomacy
Members
Member icon.png
Ticks6 (3.6s)
Materials
ItemQuantityCost
Bucket of sand.pngBucket of sand13481
Soda ash.pngSoda ash13533
Astral rune.pngAstral rune2292
Fire rune.pngFire rune630
Air rune.pngAir rune1050
Total Cost1,386
Molten glass.pngMolten glass16.9[r 1]1,977.3
Profit591.3
  1. On average

Requirements
SkillLevelXP
Crafting Crafting61 (b)130
Magic Magic77 (b)78
Quest points Requires completion of Lunar Diplomacy
Members
Member icon.png
Ticks6 (3.6s)
Materials
ItemQuantityCost
Bucket of sand.pngBucket of sand13481
Swamp weed.pngSwamp weed132,561
Astral rune.pngAstral rune2292
Fire rune.pngFire rune630
Air rune.pngAir rune1050
Total Cost3,414
Molten glass.pngMolten glass16.9[r 1]1,977.3
Profit-1,436.7
  1. On average

Crafting table[edit | edit source]

Molten glass can be made into glass items using the Crafting skill by using a glassblowing pipe on them. Each item requires one piece of molten glass to create.

Crafting Level Item Experience GE Price GP/XP
1 Beer glass.png Beer glass 17.5 75 -2.4
4 Empty candle lantern.png Empty candle lantern 19 4 -5.95
12 Empty oil lamp.png Empty oil lamp 25 6 -4.44
33 Vial.png Vial 35 3 -3.26
42 Empty fishbowl.png Empty fishbowl 42.5 9 -2.54
46 Unpowered orb.png Unpowered orb 52.5 131 0.27
49 Lantern lens.png Lantern lens 55 16 -1.84
87 Empty light orb.png Empty light orb 70 129[MG 1] -1.67
  1. This is the Grand Exchange price after adding a Cave goblin wire to make a Light orb. The Empty light orb is not able to be sold on the Grand Exchange.

Products[edit | edit source]

ItemMembersSkillsXPMaterials
Beer glass.pngBeer glass
Member icon.png
  • Crafting 1
  • Crafting 17.5
Boss lair display icon.pngBoss lair display
Member icon.png
  • Construction 87
  • Construction 1483
Crafting table 2 icon.pngCrafting table 2
Member icon.png
  • Construction 25
  • Construction 241
Crafting table 3 icon.pngCrafting table 3
Member icon.png
  • Construction 34
  • Construction 243
Crafting table 4 icon.pngCrafting table 4
Member icon.png
  • Construction 42
  • Construction 363
Decorative window icon.pngDecorative window
Member icon.png
  • Construction 69
  • Construction 4
Empty candle lantern.pngEmpty candle lantern
Member icon.png
  • Crafting 4
  • Crafting 19
Empty light orb.pngEmpty light orb
Member icon.png
  • Crafting 87
  • Crafting 70
Empty oil lamp.pngEmpty oil lamp
Member icon.png
  • Crafting 12
  • Crafting 25
Fancy teak dresser icon.pngFancy teak dresser
Member icon.png
  • Construction 56
  • Construction 182
Empty fishbowl.pngEmpty fishbowl
Member icon.png
  • Crafting 42
  • Crafting 42.5
Gilded dresser icon.pngGilded dresser
Member icon.png
  • Construction 74
  • Construction 582
Lantern lens.pngLantern lens
Member icon.png
  • Crafting 49
  • Crafting 55
Mahogany dresser icon.pngMahogany dresser
Member icon.png
  • Construction 64
  • Construction 281
Mahogany telescope icon.pngMahogany telescope
Member icon.png
  • Construction 84
  • Construction 281
Oak dresser icon.pngOak dresser
Member icon.png
  • Construction 37
  • Construction 121
Oak shaving stand icon.pngOak shaving stand
Member icon.png
  • Construction 29
  • Construction 61
Oak telescope icon.pngOak telescope
Member icon.png
  • Construction 44
  • Construction 121
Observatory lens.pngObservatory lens
Member icon.png
  • None
  • None
Rune case 1 icon.pngRune case
Member icon.png
  • Construction 41
  • Runecraft 14
  • Construction 190
  • Runecraft 25
Rune case 2 icon.pngRune case
Member icon.png
  • Construction 41
  • Runecraft 44
  • Construction 212
  • Runecraft 25
Rune case 3 icon.pngRune case
Member icon.png
  • Construction 41
  • Runecraft 90
  • Construction 247
  • Runecraft 25
Shaving stand icon.pngShaving stand
Member icon.png
  • Construction 21
  • Construction 30
Stained glass icon.pngStained glass
Member icon.png
  • Construction 89
  • Construction 5
Teak dresser icon.pngTeak dresser
Member icon.png
  • Construction 46
  • Construction 181
Teak telescope icon.pngTeak telescope
Member icon.png
  • Construction 64
  • Construction 181
Tip jar icon.pngTip jar
Member icon.png
  • Construction 40
  • Construction 651
Unpowered orb.pngUnpowered orb
Member icon.png
  • Crafting 46
  • Crafting 52.5
Vial.pngVial
Member icon.png
  • Crafting 33
  • Crafting 35

Item sources[edit | edit source]

For an exhaustive list of all known sources for this item, see here (include RDT).
SourceLevelQuantityRarity
Theatre of BloodN/A Casket.png200–240 (noted)3 × 1/30
Thermonuclear smoke devil301 Multicombat.png100 (noted)2/107

Shop locations[edit | edit source]

This list was created dynamically. For help, see the FAQ.
To force an update of this list, click here.
SellerLocationNumber
in stock
Restock
time
Price
sold at
Price
bought at
Members?
Fritz the GlassblowerEntranaN/AN/AN/ACoins 5.png 20Member icon.png
Fritz the Glassblower (Ring of charos)EntranaN/AN/AN/ACoins 25.png 25Member icon.png

Gallery (historical)[edit | edit source]

Notes[edit | edit source]

  • All the ingredients for making molten glass (seaweed and sand) can be found on the island of Entrana, except buckets, but there is a Tool leprechaun found near the Hops patch on Entrana from whom you can withdraw buckets if you have them. There is a sandpit, seaweed spawns, a range for cooking seaweed into soda ash and a furnace to make the molten glass. There is even a glassblowing pipe spawn in a nearby house.