Molten glass

Molten glass
Released							18 March 2002 (Update)
Members							Yes
Quest item							No
Properties
Tradeable							Yes
Equipable							No
Stackable							No
Noteable							Yes
Destroy							Drop
Examine							Hot glass ready to be blown into useful objects.
Values
Value							3 coins
High alch							1 coin
Low alch							1 coin
Weight							0.907 kg
Grand Exchange
Exchange							81 coins (info)
Buy limit							13,000
Daily volume							4,926,016
View real-time prices
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Advanced data
Item ID							1775

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 I, 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

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. Not picking up the glass will result in a higher rate of production, at a higher cost of materials. Since both methods using three giant seaweed and 18 buckets result in both a higher yield and rate, the combination of two giant seaweed and 12 buckets of sand is not recommended.

To increase input resource efficiency, Superglass Make can be cast in Ferox Enclave with an open looting bag to allow for quickly picking up the extra glass that goes on the floor. However, this will reduce the amount of glass-per-hour produced.

The average Crafting experience per giant seaweed and rate of glass production 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. Using this method can produce glass at a rate of approximately 10000 per hour;
• 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. Using this method can produce glass at a rate of approximately 16000 per hour;
• 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. Using this method can produce glass at a rate of approximately 13500 per hour.

These numbers include the experience from casting Superglass Make.

Creation

Furnace

Requirements

Skill		Level	XP
Crafting		1	20
Members		Ticks	2 (1.2s)
Tools	None	Facilities	Furnace

Materials

Item		Quantity	Cost
	Bucket of sand	1	34
	Soda ash	1	47
Total cost			81
	Molten glass	1	81
Profit			0

Superglass Make

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

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Giant seaweedSeaweedSoda ashSwamp weed

Requirements

Skill		Level	XP
Crafting		61 (b)	180
Magic		77 (b)	78
Requires completion of Lunar Diplomacy
Members		Ticks	6 (3.6s)

Materials

Item		Quantity	Cost
	Bucket of sand	18	612
	Giant seaweed	3	663
	Astral rune	2	110
	Fire rune	6	30
	Air rune	10	50
Total cost			1,465
	Molten glass	28.8	2,332.80
Profit			867.80

Requirements

Skill		Level	XP
Crafting		61 (b)	130
Magic		77 (b)	78
Requires completion of Lunar Diplomacy
Members		Ticks	6 (3.6s)

Materials

Item		Quantity	Cost
	Bucket of sand	13	442
	Seaweed	13	182
	Astral rune	2	110
	Fire rune	6	30
	Air rune	10	50
Total cost			814
	Molten glass	16.9	1,368.90
Profit			554.90

Requirements

Skill		Level	XP
Crafting		61 (b)	130
Magic		77 (b)	78
Requires completion of Lunar Diplomacy
Members		Ticks	6 (3.6s)

Materials

Item		Quantity	Cost
	Bucket of sand	13	442
	Soda ash	13	611
	Astral rune	2	110
	Fire rune	6	30
	Air rune	10	50
Total cost			1,243
	Molten glass	16.9	1,368.90
Profit			125.90

Requirements

Skill		Level	XP
Crafting		61 (b)	130
Magic		77 (b)	78
Requires completion of Lunar Diplomacy
Members		Ticks	6 (3.6s)

Materials

Item		Quantity	Cost
	Bucket of sand	13	442
	Swamp weed	13	5,317
	Astral rune	2	110
	Fire rune	6	30
	Air rune	10	50
Total cost			5,949
	Molten glass	16.9	1,368.90
Profit			−4,580.10

Crafting table

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. At peak efficiency it would seem just over 1800 glass items can be crafted in one hour.

Level	Item		Experience	GE Price	GP/XP
1		Beer glass	17.5	78	-0.17
4		Empty candle lantern	19	5	-4.00
12		Empty oil lamp	25	10	-2.84
33		Vial	35	3	-2.23
42		Empty fishbowl	42.5	11	-1.65
46		Unpowered orb	52.5	73	-0.15
49		Lantern lens	55	8	-1.33
87		Empty light orb	70	219	-1.16

Products

Item		Members	Skills	XP	Materials
	Beer glass		1	17.5	1 × Molten glass
	Boss lair display		87	1483	10 × Mahogany plank 5 × Molten glass 4 × Steel bar
	Crafting table 2 (Total)		25	241	4 × Oak plank 1 × Molten glass
	Crafting table 2 (Upgrade)		25	1	1 × Crafting table 1 1 × Molten glass
	Crafting table 3 (Total)		34	243	4 × Oak plank 3 × Molten glass
	Crafting table 3 (Upgrade)		34	2	1 × Crafting table 2 2 × Molten glass
	Crafting table 4 (Total)		42	363	6 × Oak plank 3 × Molten glass
	Decorative window		69	4	8 × Molten glass
	Empty candle lantern		4	19	1 × Molten glass
	Empty fishbowl		42	42.5	1 × Molten glass
	Empty light orb		87	70	1 × Molten glass
	Empty oil lamp		12	25	1 × Molten glass
	Fancy teak dresser		56	182	2 × Teak plank 2 × Molten glass
	Gilded dresser		74	582	2 × Mahogany plank 2 × Molten glass 1 × Gold leaf
	Lantern lens		49	55	1 × Molten glass
	Mahogany dresser		64	281	2 × Mahogany plank 1 × Molten glass
	Mahogany telescope		84	281	2 × Mahogany plank 1 × Molten glass
	Oak dresser		37	121	2 × Oak plank 1 × Molten glass
	Oak shaving stand		29	61	1 × Oak plank 1 × Molten glass
	Oak telescope		44	121	2 × Oak plank 1 × Molten glass
	Observatory lens		None	None	1 × Molten glass 1 × Lens mould
	Rune case (Elemental)		41 14	190 25	2 × Teak plank 2 × Molten glass 1 × Air rune 1 × Earth rune 1 × Fire rune 1 × Water rune
	Rune case (High catalytic)		41 90	247 25	2 × Teak plank 2 × Molten glass 1 × Blood rune 1 × Death rune 1 × Law rune 1 × Soul rune
	Rune case (Low catalytic)		41 44	212 25	2 × Teak plank 2 × Molten glass 1 × Body rune 1 × Chaos rune 1 × Cosmic rune 1 × Nature rune
	Shaving stand		21	30	1 × Plank 1 × Steel nails 1 × Molten glass
	Stained glass		89	5	16 × Molten glass
	Teak dresser		46	181	2 × Teak plank 1 × Molten glass
	Teak telescope		64	181	2 × Teak plank 1 × Molten glass
	Tip jar		40	651	2 × Mahogany plank 1 × Molten glass 1 × Gold leaf 5 × Platinum token
	Unpowered orb		46	52.5	1 × Molten glass
	Vial		33	35	1 × Molten glass

Item sources

For an exhaustive list of all known sources for this item, see here.

Source	Level	Quantity	Rarity
Monumental chest	N/A	200–240 (noted)	3 × 1/30
Phantom Muspah	741	89 (noted)	2 × 10/220
Thermonuclear smoke devil	301	100 (noted)	2/107

Shop locations

This list was created dynamically. For help, see the FAQ. To force an update of this list, click here. For an exhaustive list, see here.

Seller	Location	Number in stock	Restock time	Price sold at	Price bought at	Change Per	Members
Fritz the Glassblower (Ring of charos)	Entrana	N/A	N/A	N/A	25	0.0%

Changes

Date	Changes
17 July 2007 (update)	The item was graphically updated with the rework of the Observatory Quest. The item's value was increased from 2 to 3.

Gallery (historical)

29 March 2004 ⁠– 17 July 2007	17 July 2007 ⁠– present

Notes

• 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.