Refining

Refining

Debuff	No
Prolonging	Yes
Related Skills	Smithing
Scroll
	Scroll of Refining
Slot (Max)	Gloves (7) Boots (7) Tongs (8) Smithing Set (3)
Experience	1,800
Level	34
Cost	400 Silver 40 Air Rune 40 Earth Rune 40 Fire Rune 40 Cosmic Rune 1 Scroll
Description
Gain a mysterious chance to find gems and other rare materials while smithing. Each forge is designed to extract different materials. The rarest of materials requires the hottest of forges and highest tier ores to be smelted.

Refining adds a chance to find gems by 0.02% per action while Smithing. The first Refining buff has an additional 0.02% chance and a tiny chance to gain gems depending on the base smithing time.

Formula

The chance to find a random gem per action is calculated using this formula:

$GemChance={\frac {baseTime*2+refining*100+100}{500000}}\times 100\%$

Without Refining no gems drop when smithing.

Level	Image	Bar	Base Time	Buff - Gem Chance							Buff 6 - Average Gems per Day
				0	1	2	3	4	5	6
1		Bronze	6s	-	0.042%	0.062%	0.082%	0.102%	0.122%	0.142%	20
15		Iron	12s	-	0.045%	0.065%	0.085%	0.105%	0.125%	0.145%	10
30		Gold	20s	-	0.048%	0.068%	0.088%	0.108%	0.128%	0.148%	6.4
50		Mithril	30s	-	0.052%	0.072%	0.092%	0.112%	0.132%	0.152%	4.4
60		Adamantite	44s	-	0.058%	0.078%	0.098%	0.118%	0.138%	0.158%	3.1
85		Runite	90s	-	0.076%	0.096%	0.116%	0.136%	0.156%	0.176%	1.7
90		Stygian	106s	-	0.082%	0.102%	0.122%	0.142%	0.162%	0.182%	1.5

* The following table shows the distribution for random gems:

Gem	Chance
Sapphire	40%
Emerald	30%
Ruby	20%
Diamond	7%
Black Opal	3%