Specimens

Banten, Java, Indonesia

Opal

Banten, Java, Indonesia

Opal

Banten, Java, Indonesia

Opal

Banten, Java, Indonesia

Opal

Banten, Java, Indonesia

Opal

Banten, Java, Indonesia

Opal

Banten, Java, Indonesia

Opal

South Africa

Diamond

California, USA

Quartz

Merelani Hills, Arusha, Tanzania

Pyrite, Grossular, Diopside

Rio Bravo, Coahuila, Mexico

Fluorite

Congo

South Africa

South Africa

Diamond

Guantu, Kaduna State, Nigeria

Beryl

unknown

Proustite

Custer Co., Idaho, USA

Topaz

Merelani Hills, Arusha, Tanzania

Grossular

Merelani Hills, Arusha, Tanzania

Graphite, Grossular

Banten, Java, Indonesia

Opal

Banten, Java, Indonesia

Opal

Banten, Java, Indonesia

Opal

Huanggang Mine, Inner Mongolia, China

Ilvaite

Merelani Hills, Arusha, Tanzania

Grossular

Keweenaw Peninsula, Michigan, USA

Copper, Calcite