Gemstone
piece of mineral used to make jewelry
Cullinan I
semiprecious stone
Spinel of the Grand Crown of Russia
birthstone
carbuncle
agate
sapphire
gem
Light of the Desert
diamond
diamond simulant
cat's eye
synthetic gemstone
toadstone
carnelian
sardine
yttrium aluminium garnet
brilliant
ruby
emerald
precious stone
Derbyshire Blue John
diamond
Minoan sealstone
tide jewels
amethyst