Gleason's Gielinor Guide

Uncut opal

Released							27 January 2003 (Update)
Members							Yes
Properties
Tradeable							Yes
Equipable							No
Stackable							No
Noteable							Yes
Options							Drop
Examine							This would be worth more cut.
Values
Value							20 coins
High alch							12 coins
Low alch							8 coins
Weight							0.003 kg
Grand Exchange
Exchange							80 coins (info)
Buy limit							10,000
Daily volume							89,465
View real-time prices
Advanced data
Item ID							1625
Link							MOID

An uncut opal is a semi-precious gem used in Crafting. It can be cut with a chisel to make an opal, granting 15 Crafting experience. There is a chance to unsuccessfully cut the opal, resulting in a crushed gem and 3.8 experience. Opals are the lowest level gemstone and are worth very little.

Uncut opals are found mostly with the Mining skill, only by mining gem rocks which are located in Shilo Village after a player has completed the Shilo Village quest, in the Lunar Isle mine after Lunar Diplomacy, or on The Onyx Crest after 47 Sailing; or by mining the shell of the Gemstone Crab. Opals can also be found while panning at the Digsite near the River Salve, or they may be stolen from H.A.M members via the Thieving skill.

Cutting chance

The chance to successfully cut an opal is: (level−1)*122/98+129256^[1]

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Based on this probability formula, the price of uncut opal 80 and the price of opal 178, the minimum Crafting level to breakeven or better when cutting opals is -10.

Training

Crafting

Level	Input	Material Cost^{[t 1]}	Output	Sell Price	Profit / loss	XP/Craft	XP/Hour	Coins/XP
1	Uncut opal	80	Opal	178	98	15	43,500	6.53

^ Cost calculated assuming all inputs are purchased from the Grand Exchange.

Products

	Skills	XP	Materials
Crushed gem	1	3.7	1 × Uncut opal
Opal	1	15	1 × Uncut opal
Opal machete	None	None	300 × Trading sticks 3 × Uncut opal 1 × Gout tuber

Item sources

Source	Level	Quantity	Rarity
Gem rocks	40	1	60/128
H.A.M. Member	15	1	2/102
Hazelmere	N/A	3 (noted)	10/128
Panning tray Mud	1	1	3/40
H.A.M. Guard	12; 18; 22	1	2/110
King Bolren	N/A	3 (noted)	10/128
G.L.O. Caranock	N/A	3 (noted)	10/128
Captain Ninto	N/A	2–3 (noted)	10/128
Brambickle	N/A	2–3 (noted)	10/128
Garkor	N/A	3 (noted)	10/128
Gnormadium Avlafrim	N/A	3 (noted)	10/128
Captain Daerkin	N/A	2–3 (noted)	10/128
Professor Imblewyn	N/A	3 (noted)	10/128
Captain Bleemadge	N/A	3 (noted)	10/128
Wingstone	N/A	2–3 (noted)	10/128
Ambassador Ferrnook	N/A	3 (noted)	10/128
Ambassador Gimblewap	N/A	3 (noted)	10/128
Ambassador Spanfipple	N/A	3 (noted)	10/128
Ogre Coffin	20	1	3/100
Professor Onglewip	N/A	3 (noted)	10/128
Professor Manglethorp	N/A	3 (noted)	10/128
Chest (Dorgesh-Kaan Rich)	78	1	1/15
Lieutenant Schepbur	N/A	3 (noted)	10/128
Captain Dalbur	N/A	3 (noted)	10/128
Captain Klemfoodle	N/A	3 (noted)	10/128
Penwie	N/A	2–3 (noted)	10/128
Skeleton Mage Level 83	83	1	10/128
Guard (H.A.M. Storerooms)	20	1	6/500
Soil Level 2 digs	1	1	1/16
Wise Old Man tasks	N/A	1	Uncommon
Casket (Reward pool)	N/A	25–50 (noted)	9/230
Storage crate	N/A	1	5/195
Opulent salvage	87	1	30/424
Mysterious glow	N/A	1	Unknown
Gemstone Crab	160	1	3 × 9/32