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Opal

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Opal
Opal
Release date 27 January 2003 (Update)
Members only? Yes
Quest item? No
Tradeable? Yes
Equipable? No
Stackable? No
High Alch 60 coins
Low Alch 40 coins
Destroy Drop
Store price Not sold
Exchange price 247 coins (info)
Buy limit Unknown
Weight 0 kg
Examine
A semi precious stone.
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An opal is the lowest level of semi-precious gem in RuneScape. These are created by cutting an uncut opal with a chisel which gives 15 crafting experience. They may also be stolen from H.A.M members using Thieving.

Cut opals may be sold to Gabooty's Tai Bwo Wannai Cooperative in Tai Bwo Wannai Village for 30 trading sticks after 100 sold, while uncut opals only sell for 6. This may be explained by the fact that cutting opals destroys many of them, leading to increased value for opals that survived the cutting process.

While cutting opals, the player will occasionally accidentally crush an uncut opal into a crushed gem and will receive only 3.8 Crafting experience.

(In a test of 1000 opals at crafting level 1-27, 544 were cut while 456 were crushed. At levels 42-44, 670 opals were cut and 330 were crushed, in a test of 1000 opals at crafting level 50-51, 741 opals were cut and 259 were crushed, 1000 opals at crafting level 51-52, 828 opals were cut and 172 were crushed, 1000 opals at crafting level 71, 855 opals were cut and 145 were crushed. And in a similar test with 1000 opals at level 96, 958 opals were cut and 42 were crushed. At level 99 only 24 out of 1000 were crushed.)

Level Total gems Successful Crushed % Successful Exp

gained

1-27 1000 544 456 54.4 9892.8
42-44 1000 670 330 67.0 10791.0
50-51 1000 741 259 74.1 12099.2
51-52 1000 828 172 82.8 13073.6
71 1000 855 145 85.5 13376.0
82 5435 4898 537 90.1 75510.6
96 1000 958 42 95.8 14529.6
99 1000 976 24 97.6 14731.2

Based on this experimental data, the player chance of successfully cutting an opal could be roughly modeled by the following equation:

Chance of Success = 0.5 - 0.005(Crafting Level)

Using the chisel on an already cut opal make 12 opal bolt tips and gives the player 1.5 Fletching experience per gem. Opal bolt tips are used to tip bronze bolts, which can then be enchanted. Opals are not used in jewelry crafting.


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