Perfect Gemstones

Hero

Hero mobs can sometimes drop hero-level perfect gems when they die. The group of players usually needs to be at least five in size (though has been known to occur with four) and the mobs need to be at least level 80 (with higher levels having a higher chance). Some example areas are Alpha Thule, and certain mobs in Exploration Outpost and The Great Divide.

Lord

Lord mobs have a SLIM chance to load perfect gemstones on the ground when they die. In order to qualify, the mob must be level 150+, and there must be 5+ lords in the group. 200+ mobs have higher odds.

Which gemtype is determined by the plane. Nowhere, midgaardia, hell, imm, angel, arena, legend and thorngate planes do not generate stones.

Here's a list of what gems you can expect to find on each of the outer planes

Airscape	Amethyst
Astral	Sapphire
Arcadia	Sapphire
Firerealm	Amethyst
Karnath	Ruby
Kzinti Homeworld	Emerald
Noctopia	Diamond
Outland	Emerald
Plane Of Water	Amethyst
Tarterus	Ruby
World Of Stone	Amethyst