Gem Values and Value Adjustment

Gem value classes (d% / Type / Base Value in gp / Number Found): Number Found 01-20 Ornamental 10 1d10 21-45 Semiprecious 50 1d8 46-75 Fancy 100 1d6 76-95 Precious 500 1d4 96-00 Gem 1,000 1d2 Jewel 5,000 1 Value adjustment (roll 2d6): 2d6 Value Adjustment 2 Next Lower Value Row 3 1/2 4 3/4 5-9 Normal Value 10 1.5 Times 11 2 Times 12 Next Higher Value Row