If a treasure hoard includes gemstones, you can use the following tables to randomly determine the kind of gemstones found, based on their value. You can roll once and assume all the gems are the same, or roll multiple times to create mixed collections of gemstones.

1000gp Gemstones:
d8 = 3

Emerald (transparent deep bright green)

1000gp Gemstones
d81000gp Gemstones
1Black opal (translucent dark green with black mottling and golden flecks)
2Blue sapphire (transparent blue-white to medium blue)
3Emerald (transparent deep bright green)
4Fire opal (translucent fiery red)
5Opal (translucent pale blue with green and golden mottling)
6Star ruby (translucent ruby with white star-shaped center)
7Star sapphire (translucent blue sapphire with white star-shaped center)
8Yellow sapphire (transparent fiery yellow or yellow-green)