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.

100gp Gemstones:
d10 = 10

Tourmaline (transparent pale green, blue, brown, or red)

100gp Gemstones
d10100gp Gemstones
1Amber (transparent watery gold to rich gold)
2Amethyst (transparent deep purple)
3Chrysoberyl (transparent yellow-green to pale green)
4Coral (opaque crimson)
5Garnet (transparent red, brown-green, or violet)
6Jade (translucent light green, deep green, or white)
7Jet (opaque deep black)
8Pearl (opaque lustrous white, yellow, or pink)
9Spinel (transparent red, red-brown, or deep green)
10Tourmaline (transparent pale green, blue, brown, or red)