Gems
Use the following tables to determine the specific types of gemstones found in a treasure. Most often, caches of gemstones contain only one or two types of gems. Large, flawless, or unusually colored gems might be worth as much as ten times the usual price for their type.
10 GOLD GEMSTONES (D6)
1 Agate. Usually translucent green, brown, and yellow (fire agate is iridescent)
2 Lapis lazuli. Deep blue, sometimes flecked with gold
3 Malachite. Opaque, mottled green, often found in copper deposits
4 Obsidian. Opaque black, produced from lava
5 Quartz. Usually clear or subtly colored and transparent (rose quartz is light pink)
6 Turquoise. Opaque, blue-green
50 GOLD GEMSTONES (D6)
1 Bloodstone. Opaque, dark green stone with blood-red spots
2 Carnelian. Opaque orange, red, or brown
3 Citrine. Transparent yellow or orange
4 Jasper. Opaque, sometimes banded, often green or brown
5 Moonstone. Translucent bluish-white
6 Onyx. Opaque black or white
100 GOLD GEMSTONES (D8)
1 Amber. Translucent yellow-orange, made of fossilized tree resin
2 Amethyst. Transparent purple
3 Coral. Opaque red, made of polished sea coral
4 Garnet. Usually transparent red, but other colors are possible
5 Jade. Translucent green
6 Jet. Opaque black, made of fossilized wood
7 Pearl. Opaque white, or very rarely black, produced by oysters and similar creatures
8 Tourmaline. Transparent, nearly any color
500 GOLD GEMSTONES (D4)
1 Aquamarine. Transparent pale blue
2 Peridot. Transparent green or olive
3 Spinel. Transparent red, blue, purple, or pink
4 Topaz. Transparent, any color but most often yellow to red
1,000 GOLD GEMSTONES (D6)
1–2 Opal. Transparent, iridescent, many colors including white, black, blue, red, and green
3–4 Sapphire. Transparent and usually blue, but can be green, pink, yellow, or purple (star sapphires have white star-shaped inclusions)
5–6 Emerald. Transparent green
5,000 GOLD GEMSTONES (D6)
1–2 Diamond. Transparent and clear (the most prized diamonds have no visible inclusions or flaws)
3–4 Jacinth. Transparent red-orange
5–6 Ruby. Transparent red (star rubies have white star-shaped inclusions)