Colorful and interesting Tourmaline crystal from the Cruziero Mine. The lower half is chatoyant and alternates between greens, reds, and blues before grading up to a transparent green zone followed by a pink termination. Complete all around and undamaged. Weighs 6.57 grams.

Blue-cap Tourmaline crystal from the famous Sapo Mine. The lower core is red, followed by a blue/green zone then a deep blue termination. Complete all around and undamaged except for one trivial edge chip. Weighs 7.37 grams.

Glossy single black Ilvaite crystal with typical chisel-shaped termination. Wonderful curving crystal faces give it style and uniqueness. Large impressive crystal that is wider than it is tall. Complete all around.

Transparent Gypsum var. Selenite included with Copper. An excellent example with dendrites of Copper clearly visible extending through the highly transparent Selenite. Out of an old collection from the 1980s.

Feldspar is a mineral not ususally known for fine collector gem crystals, but at this locality in Madagascar, amazing water clear crystals are sometimes found. This is a large, thick crystal in good condition, with a cleavage face on the back and minor edge chipping. The crystal has a good yellow coloration and is internally transparent. Weighs 25 grams.

Feldspar is a mineral not ususally known for fine collector gem crystals, but at this locality in Madagascar, amazing water clear crystals are sometimes found. This is a large, thick crystal in good condition, with a cleavage faces on two sides and minor edge chipping. The crystal has a good yellow coloration and is internally transparent. Weighs 45.6 grams.

Terminated single Tremolite crystal with bright, vivid green coloration. Translucent to transparent, complete all around, with a flat, glassy termination. Most are mere shards or fragments and complete terminated crystals such as this are are much less common. Like a number of other mineral species from Merelani, these Tremolites are considered the world's best of species.

Terminated single Tremolite crystal with bright, vivid green coloration. Translucent to transparent, complete all around, with flat, glassy termination faces. Most are mere shards or fragments and complete terminated crystals such as this are are much less common. Like a number of other mineral species from Merelani, these Tremolites are considered the world's best of species.

Translucent to transparent blue Gahnite crystal, the zinc rich end member and one of the rarer species in the Spinel group of minerals. A complete octahedron with chips on 3 of the tips, otherwise perfect and one of the sharper larger sized crystals I've had of this material. These were first discovered in 2001 and are found mostly of industrial quality. Though they don't get very large, the color is spectacular. The GIA has written a nice article about these crystals published in Gems & Gemology, Fall 2019, Vol. 55, No. 3.

Translucent to transparent blue Gahnite crystal, the zinc rich end member and one of the rarer species in the Spinel group of minerals. A complete octahedron with small chips on 3 of the tips, otherwise perfect and a sharper than most example of this material. These were first discovered in 2001 and are found mostly of industrial quality. Though they don't get very large, the color is spectacular. The GIA has written a nice article about these crystals published in Gems & Gemology, Fall 2019, Vol. 55, No. 3.

Translucent to transparent blue Gahnite crystal, the zinc rich end member and one of the rarer species in the Spinel group of minerals. A complete octahedron with small chips on 2 of the tips, otherwise perfect and a sharper than most example of this material. These were first discovered in 2001 and are found mostly of industrial quality. Though they don't get very large, the color is spectacular. The GIA has written a nice article about these crystals published in Gems & Gemology, Fall 2019, Vol. 55, No. 3.