The current species, columbite-(Fe) retains the old root name and has the suffix -(Fe) to indicate the dominance of iron in the species.
General Columbite-(Fe) Information ; Help on Chemical Formula: Chemical Formula: Fe++Nb2O6 ; Help on Composition: Composition: Molecular Weight = 337.66 gm.
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a black mineral group that is an ore of niobium. It has a submetallic luster, a high density, and is a niobate of iron and manganese.
Mined in 2003 in Jiangxi, China, this stibnite is one of the largest surviving specimens from what has become one of the world's most significant stibnite finds ...
Columbite-Fe is an uncommon mineral that occurs generally as an accessory mineral in granite pegmatites, but can also be found in carbonatites, and as detritus ...
Columbite is the most important mineral containing the rare element niobium and is its main ore. The name Columbite has been discredited by the IMA.
Crystal System: Orthorhombic. Series Formula: Fe 2+ Nb 2 O 6 to Mn 2+ Nb 2 O 6. A series between Columbite-(Fe) and Columbite-(Mn).
Columbite-(Fe) is a mineral that is fairly common rarely available as a faceted gem mostly since it is opaque black to brownish black.
$2,850.00
A great historic Columbite-(Fe) crystal from the famed Strickland Quarry in Connecticut! It is huge and impactful, and dates back to the namesake quarry owner.
Columbite-(Fe) - Thin black Columbite crystal showing one termination and deep striations. . This and many more mineral specimens are available for sale at ...
