The Encyclopedia
Stone Guides
Stone Guide
Alexandrite
Ural Mountains, Russia (also Brazil, Sri Lanka, East Africa)
Stone Guide
Burma Ruby
Mogok Valley, Myanmar
Stone Guide
Colombian Emerald
Boyacá Department, Colombia
Stone Guide
Conch Pearl
Caribbean (Bahamas, Florida Keys - historical, Honduras)
Stone Guide
Demantoid Garnet
Russia (Ural Mountains), Namibia
Stone Guide
Fancy Blue Diamond
South Africa (Cullinan), India (Golconda - historical)
Stone Guide
Fancy Pink Diamond
Australia (Argyle, closed), Brazil, South Africa
Stone Guide
Fancy Yellow Diamond
Worldwide
Stone Guide
Kashmir Sapphire
Jammu & Kashmir, India
Stone Guide
Natural Pearl
Persian Gulf, Indian Ocean, Gulf of Mexico (historical)
Stone Guide
Old European Cut Diamond
Europe/USA
Stone Guide
Padparadscha Sapphire
Sri Lanka (Ceylon) primary; also Tanzania, Madagascar
Stone Guide
Paraíba Tourmaline
Paraíba State, Brazil (also Nigeria & Mozambique)
Stone Guide
Pink Tourmaline
Worldwide, Mozambique
Stone Guide
Spinel
Mahenge (Tanzania), Mogok (Myanmar), Luc Yen (Vietnam)
Stone Guide
Tanzanite
Tanzania (Near Mount Kilimanjaro)
Stone Guide
Tsavorite Garnet
Kenya, Tanzania