Corundum (var: Sapphire) (Bi-color Twin)Good Sapphire crystals are hard to find, twins are even more rare, but finding true bicolor twins is off the charts. Now I say true bicolor twins, because I dont really count a twinned crystal with varying degrees of blue as being multicolored necessarily. Theres no mistake with this piece as the color contrasting is about a defined as it gets for Sapphire. Ive seen twinned Sapphires with blue and yellow hues in the same crystal, but I dont know if I

the crystals are included with an unknown blackish mineral (probably Jamesonite) to create an eye-catching two-toned effect

For the size and aesthetic

and specimen value is second

prismatic crystals of Hubnerite with rarely seen gemmy

hosts hundreds of good quality Tetrahedrite crystals measuring up to 6 mm with great luster

The twins on this specimen are some of the largest I’ve seen from the locality

They have a very high "wet" luster with beautiful overall crystal form

the Siglo XX specimens are also found with interesting associations and pleasing matrixes

and more than suitable for any collector of Quartz specimens from Colorado

cream-colored Dolomite rhombs

Great condition overall and it’s not often one sees such a fantastic blocky twinned crystal of Vivianite like this

This is the only specimen of this particular style that I've ever had to offer and was part of my personal collection for years