Herderite

CaBePO4(F,OH)

These samples of herderite are displayed in the Smithsonian Museum of Natural History. Herderite is a phosphate mineral of beryllium with fluorine and it has the composition CaBePO4(F,OH). The sample at left is about 5 cm across and is from Gilgit, Northern Areas, Pakistan. The sample at right is from Fletcher mine, North Groton, New Hampshire. It is about 5 cm wide.

The sample at left is about 4 cm across and is from Minas Gerais, Brazil. It is described as herderite with quartz and elbaite.

Mindat: Herderite

See also Hydroxyl-Herderite
Minerals
Index
 
HyperPhysics*****GeophysicsR Nave
Go Back







Hydroxyl-Herderite

CaBePO4(OH)

These samples of hydroxyl-herderite are displayed in the Smithsonian Museum of Natural History. Hydroxyl-herderite is herderite without the fluorine content or if the hydroxyl group is dominant over the fluorine. It is a phosphate mineral of beryllium with the composition CaBePO4(OH). The sample at left is about 8 cm across and is from Virgem da Lapa, Minas Gerais, Brazil.

This sample of hydroxyl-herderite is from Minas Gerais, Brazil. The accompanying gem is 1.5 carats. The sample is about 8 cm wide.

At left is an extraordinary trio of gems displayed at the Smithsonian Museum of Natural History. The center gem is hydroxyl-herderite , 161.08 carats, from Brazil, perhaps the finest gem of its kind with its size and deep green color. The 40.1 carat elbaite gem shown at the left of the trio is from Mozambique as a part of a recent gem discovery with an unusual color for elbaite. On the right of the gem trio is a 15.93 carat grossular gem of variety tsavorite from Kenya.

Mindat: Hydroxyl-Herderite

Minerals
Index
 
HyperPhysics*****GeophysicsR Nave
Go Back