Single well terminated Milarite crystal from Namibia. Milarite is a rare silicate mineral with good crystals found at only a small number of localities worldwide. Well terminated, translucent single crystal with nicely beveled termination edges. Complete and undamaged with some irregular growth on a back prism face. A rare thumbnail. Ex. Jon Sigerman.

Well saturated purple Apatite crystals. The main crystal is 1.3cm wide and 8mm thick. Ex. Jon Sigerman acquired from Wayne and Stevia Thompson.

Irridescent combination specimen of Polybasite and Stephanite crystals from a one time find in the 1970s. The specimen features platy groups of Polybasite and elongated crystals of Stephanite with a colorful and attractive purple/blue/green iridescence. Both top and bottom sides photographed. Ex. Neil Levett collection.

Bright metallic 1.7cm spinel twinned Gold crystal group from recent finds in Morocco. This is an aesthetic cluster with two main spinel-twin crystals rising up together from a thicker base. Weighs 1.36 grams. Ex. Jon Sigerman.

V-twin crystal of color change Diaspore. From new finds in the mountains near Milas, these new Diaspore crystals are spectacular in color and form. Glassy, flat termination faces on both 'arms'. There is a small notch on the left side where another crystal grew, and a very slight edge cleave on the lower left, otherwise complete and undamaged. Gem quality and transparent inside. Medium purple color in natural sunlight. Ex. Jon Sigerman.

Highly gemmy vivid green Peridot crystal. Mogok is known for the world's best Peridot, though they much less common than crystals from Pakistan. They are characterized by great transparency and fine green color, often with surface etching. Larger crystals (such as Bill Larson's that has been the back cover of Mineralogical Record many times), even only 4-5cm, can cost in the many tens to hundreds of thousands of dollars, they are just that rare and desirable. Though small, this crystal is gem quality internally and has high surface luster on the narrow prism faces and frosted luster on the wider prism faces. Ex. Jon Sigerman.

Single purple Topaz crystal from Ouro Preto. Complete all around and undamaged with glossy luster. Uncommon color! Ex. Jon Sigerman.

Single blue Tanzanite crystal with micro hair-like inclusions of Merelaniite. The Tanzanite is complete all around, glassy, and transparent. Merelaniite is a recently discovered rare mineral in the Cylindrite group of minerals. These are rare enough just attached to other minerals, but even more so when included within a complete Tanzanite crystal! Ex. Jon Sigerman.

Small single pink Tanzanite crystal. Glassy and transparent, it's pink in both directions. The wider face is a lighter pink but the side face pops with incredible color, especially for a small crystal. Ex. Jon Sigerman.

Sharp single Diopside crystal with excellent luster, transparency. Better than average color for such a transparent crystal, and undamaged, complete all around. Ex. Jon Sigerman.

Transparent orange Villiaumite from the open pit phonolite quarries in Aris, Namibia. While you can get larger, dark red, translucent cleavages from the Kola peninsula in Russia, I think these gem orange crystals from Aris are the world's best Villiaumite, and this is a good one. This is an exquisite thumbnail-sized Villiaumite with total transparency and a uniform orange color. Complete all around and undamaged. Ex. Jon Sigerman.