Ametrine (natural bi-color Quartz)Ametrine is the naturally occurring bi colored variety of Quartz that is only found at the Anahi Mine in Bolivia. The most alluring aspect of Ametrine is the fact that it shows distinct purple (AMEthyst) and yellow (ciTRINE) zoning where the purple sections are situated along the positive {r} rhombohedral faces, and the alternating yellow sections are positioned under the negative {z} rhombohedral faces. This growth forms an alternating "radiation"

Specimen# CO712B185

The stone is only very very slightly included

it is truly only found in a handful of localities in well-crystallized display specimens

Warren Prosser

this is an important and historic specimen that would make a superb addition to any collection

Specimen # BOL711B129

pinkish-orange color cuboctahedral crystal of this hard-to-find species on matrix

rich blue-green colored prismatic Amazonite crystal beautifully flaring off of cream-colored Feldspar matrix

A very attractive and hard to find display specimen that would make a great addition to a Calcite suite or a collection of Colorado minerals

as it's not as much of a tight rose

A small nick on the back of the Cassiterite keeps the piece from being 100% perfect

and aesthetically sitting on matrix