Onyx gems are rare gems used in the Crafting skill. They are the second rarest gems in Old School RuneScape, behind the zenyte which is created from an onyx and a zenyte shard. Onyx can be cut from uncut onyx with level 67 Crafting by using a chisel, granting 167.5 experience. When used with a furnace and jewellery mould, they can be used to make onyx jewellery.
Onyx jewellery can be enchanted by casting the Lvl-6 Enchant spell on a piece of onyx jewellery, requiring level 87 Magic, 20 earth runes, 20 fire runes and 1 cosmic rune to cast, and granting 97 experience.
An onyx can be cut at level 73 Fletching to create 24 onyx bolt tips (resulting in a loss of -1,442,407 coins).
Six of these are used to build a volcanic theme at level 85 Construction in a player's Superior Garden. In addition, one is used to build an obsidian decorative bench at level 98 Construction.
Requirements| Skill | Level | XP |
|---|
 Crafting | 67 (b) | 167.5 |
| Members | | Ticks | 2 (1.2s) |
|---|
| Tools |  | Facilities | None |
|---|
Materials| Item | Quantity | Cost |
|---|
 | Uncut onyx | 1 | 1,721,089 |
| Total Cost | 1,721,089 |
|---|
 | Onyx | 1 | 1,646,695 |
| Profit | -74,394 |
|---|
Crafted, enchanted goods, and bolt tips[edit | edit source]
For an exhaustive list of all known sources for this item, see
here (
include RDT).
| Source | Level | Quantity |
|---|
| Tekton |  | 1 | 1/450 |
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| Jewellery |
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| Enchanted jewellery |
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| Fletching |
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| Quest items |
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| Semiprecious stones |
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| Precious stones |
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| Quest-related gems |
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| Others |
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Yes
73
