Prehnite

Prehnite Ca₂Al(AlSi₃O₁₀)(OH)₂ O&G Woodbury Quarry, Woodbury, Litchfield Co., Connecticut

Prehnite Ca₂Al(AlSi₃O₁₀)(OH)₂ Keweenaw Co., Michigan, Ex George J. Balogh Collection

Prehnite Ca₂Al(AlSi₃O₁₀)(OH)₂ with Chrysocolla and Copper, Phoenix Mine,Keweenaw Co., Michigan

Prehnite Ca₂Al(AlSi₃O₁₀)(OH)₂ with Xonotlite, Willemite, Hylophane and possibly Nasonite, Franklin, Sussex Co., New Jersey

Prehnite Ca₂Al(AlSi₃O₁₀)(OH)₂ (pink) under SW Ultraviolet Light, with Xonotlite (blue-violet), Willemite (green), Hylophane(magenta) and possibly Nasonite (grayish-mustard), Franklin, Sussex Co., New Jersey

Prehnite Ca₂Al(AlSi₃O₁₀)(OH)₂

Prehnite Ca₂Al(AlSi₃O₁₀)(OH)₂ after Laumontite, Kandivali Quarry, Malad, Ward 38, Mumbai, Maharashtra, India ex Chris & Agatha Galas

Prehnite Ca₂Al(AlSi₃O₁₀)(OH)₂ with Copper, Cu, Caledonia Mine, Ontonagon Co., Michigan

Prehnite Ca₂Al(AlSi₃O₁₀)(OH)₂ with Epidote, Mali

Prehnite Ca₂Al(AlSi₃O₁₀)(OH)₂ with Copper, Cu, Cliff Mine, Keweenaw Co., Michigan, Ex Renaud Vochten

Prehnite Ca₂Al(AlSi₃O₁₀)(OH)₂ in Amygdaloidal Basalt with Epidote, Ojibway Mine, Keweenaw Co., Michigan

Prehnite Ca₂Al(AlSi₃O₁₀)(OH)₂ with Epidote, Kayes Region, Mali

Prehnite Ca₂Al(AlSi₃O₁₀)(OH)₂ after Laumontite, Kandivali Quarry, Malad, Ward 38, Mumbai, Maharashtra, India ex Chris & Agatha Galas

Prehnite Ca₂Al(AlSi₃O₁₀)(OH)₂ Near Simpson Island, Thunder Bay District, Ontario

Prehnite Ca₂Al(AlSi₃O₁₀)(OH)₂ O & G Woodbury Quarry, Woodbury, Litchfield Co., Connecticut

Prehnite Ca₂Al(AlSi₃O₁₀)(OH)₂ O & G Woodbury Quarry, Woodbury, Litchfield Co., Connecticut

Prehnite Ca₂Al(AlSi₃O₁₀)(OH)₂ with Copper, Cu, Osceola #13 Mine, Houghton Co., Michigan

Prehnite Ca₂Al(AlSi₃O₁₀)(OH)₂ with Copper, Cu, Osceola #13 Mine, Houghton Co., Michigan

Prehnite Ca₂Al(AlSi₃O₁₀)(OH)₂ Millington Quarry, Morris Co., New Jersey

Prehnite Ca₂Al(AlSi₃O₁₀)(OH)₂ Houghton Co., Michigan

Prehnite Ca₂Al(AlSi₃O₁₀)(OH)₂ Houghton Co., Michigan

Prehnite Ca₂Al(AlSi₃O₁₀)(OH)₂ in Basalt, Keweenaw Co., Michigan