Specimens

Minas Gerais, Brazil

Montebrasite

Mt. Ikaka, Betafo Dist., Antananrivo Prov., Madagascar

Quartz

Merelani Hills, Arusha, Tanzania

Pyrite

Merelani Hills, Arusha, Tanzania

Pyrite

Butte, Silver Bow Co., Montana, USA

Pyrite

Apex Mine, San Carlos, Chihuahua, Mexico

Vanadinite

Rocklands Mine, Cloncurry Shire, Queensland, Australia

Copper

Prieska, Northern Cape, South Africa

Quartz

Namalulu, Tanzania

Rio Grande do Sul, Brazil

Quartz

Rio Grande do Sul, Brazil

Quartz

Pech, Kunar Prov., Afghanistan

Denton Mine, Hardin County, Illinois, USA

Galena, Fluorite

Cruzeiro Mine, Sao Jose da Safira, Minas Gerais, Brazil

Daye Mine, Hubie Prov., China

Chalcocite, Chalcopyrite

Goboboseb Mtns., Erongo Region, Namibia

Quartz

Erongo Mtns., Namibia

Fluorite, Quartz

Merelani Hills, Arusha, Tanzania

Prehnite

Merelani Hills, Arusha, Tanzania

Prehnite

Ouro Preto, Minas Gerais, Brazil

Topaz

California, USA

Gold

Tsumeb, Namibia

Smithsonite

Rapid Creek, Yukon, Canada

Lazulite, Quartz

Mwanjanga, Manyara Region, Tanzania

Natrolite

Namalulu, Tanzania