Mixed Minerals


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D203 - Tourmaline $ 650 SOLD
Cruziero Mine, Minas Gerais, Brazil
miniature - 4.3 x 1 x 0.8 cm


(click on an image to enlarge)

Tourmaline from Cruziero Mine, Minas Gerais, Brazil [db_pics/pics/D203a.jpg] Tourmaline from Cruziero Mine, Minas Gerais, Brazil [db_pics/pics/D203b.jpg] Tourmaline from Cruziero Mine, Minas Gerais, Brazil [db_pics/pics/D203c.jpg] Tourmaline from Cruziero Mine, Minas Gerais, Brazil [db_pics/pics/D203d.jpg] Tourmaline from Cruziero Mine, Minas Gerais, Brazil [db_pics/pics/D203e.jpg]

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.


D204 - Tourmaline $ 450
Poa Alta Mine, Coronel Murta, Minas Gerais, Brazil
thumbnail - 2.5 x 1.4 x 0.9 cm


(click on an image to enlarge)

Tourmaline from Poa Alta Mine, Coronel Murta, Minas Gerais, Brazil [db_pics/pics/D204a.jpg] Tourmaline from Poa Alta Mine, Coronel Murta, Minas Gerais, Brazil [db_pics/pics/D204b.jpg] Tourmaline from Poa Alta Mine, Coronel Murta, Minas Gerais, Brazil [db_pics/pics/D204c.jpg] Tourmaline from Poa Alta Mine, Coronel Murta, Minas Gerais, Brazil [db_pics/pics/D204d.jpg]

Colorful and interesting Tourmaline crystal from the lesser known Poa Alta Mine. The lower is red and then the crystal alternates between various shades of greens and reds, then ends with a very thin purple pink termination. Complete all around and undamaged and has a natural indentation from another crystal on the lower backside. Weighs 6.37 grams.


D205 - Tourmaline $ 1500
Sapo Mine, Minas Gerais, Brazil
thumbnail - 2.3 x 1.2 x 1.1 cm


(click on an image to enlarge)

Tourmaline from Sapo Mine, Minas Gerais, Brazil [db_pics/pics/D205a.jpg] Tourmaline from Sapo Mine, Minas Gerais, Brazil [db_pics/pics/D205b.jpg] Tourmaline from Sapo Mine, Minas Gerais, Brazil [db_pics/pics/D205c.jpg] Tourmaline from Sapo Mine, Minas Gerais, Brazil [db_pics/pics/D205d.jpg]

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.


M871 - Ilvaite $ 275
Huanggang Mine, Inner Mongolia, China
miniature - 4.8 x 4.3 x 3.9 cm


(click on an image to enlarge)

Ilvaite from Huanggang Mine, Inner Mongolia, China [db_pics/pics/M871a.jpg] Ilvaite from Huanggang Mine, Inner Mongolia, China [db_pics/pics/M871b.jpg] Ilvaite from Huanggang Mine, Inner Mongolia, China [db_pics/pics/M871c.jpg] Ilvaite from Huanggang Mine, Inner Mongolia, China [db_pics/pics/M871d.jpg]

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.


M962 - Copper in Selenite $ 120 SOLD
Mission Mine, Pima Co, Arizona, USA
miniature - 5 x 2 x 0.6 cm


(click on an image to enlarge)

Copper in Selenite from Mission Mine, Pima Co, Arizona, USA [db_pics/pics/M962a.jpg] Copper in Selenite from Mission Mine, Pima Co, Arizona, USA [db_pics/pics/M962b.jpg] Copper in Selenite from Mission Mine, Pima Co, Arizona, USA [db_pics/pics/M962c.jpg] Copper in Selenite from Mission Mine, Pima Co, Arizona, USA [db_pics/pics/M962d.jpg] Copper in Selenite from Mission Mine, Pima Co, Arizona, USA [db_pics/pics/M962e.jpg]

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.


M839 - Sanidine $ 250 SOLD
Itrongay, Betroka, Anosy Region, Madagascar
thumbnail - 2.5 x 2.5 x 1.8 cm


(click on an image to enlarge)

Sanidine from Itrongay, Betroka, Anosy Region, Madagascar [db_pics/pics/M839a.jpg] Sanidine from Itrongay, Betroka, Anosy Region, Madagascar [db_pics/pics/M839b.jpg]

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.


M837 - Sanidine $ 250 SOLD
Itrongay, Betroka, Anosy Region, Madagascar
miniature - 4.5 x 2.4 x 2.2 cm


(click on an image to enlarge)

Sanidine from Itrongay, Betroka, Anosy Region, Madagascar [db_pics/pics/M837a.jpg] Sanidine from Itrongay, Betroka, Anosy Region, Madagascar [db_pics/pics/M837b.jpg] Sanidine from Itrongay, Betroka, Anosy Region, Madagascar [db_pics/pics/M837d.jpg]

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.


M852 - Tremolite $ 75
Merelani Hills, Arusha, Tanzania
thumbnail - 1.4 x 1.1 x 0.5 cm


(click on an image to enlarge)

Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M852a.jpg] Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M852b.jpg] Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M852c.jpg] Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M852d.jpg]

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.


M853 - Tremolite $ 125
Merelani Hills, Arusha, Tanzania
thumbnail - 2.1 x 1.7 x 0.4 cm


(click on an image to enlarge)

Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M853a.jpg] Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M853b.jpg] Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M853c.jpg]

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.


M945 - Tremolite $ 75
Merelani Hills, Arusha, Tanzania
thumbnail - 1.5 x 0.8 x 0.4 cm


(click on an image to enlarge)

Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M945a.jpg] Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M945b.jpg] Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M945c.jpg] Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M945d.jpg]

Terminated single Tremolite crystal with bright, vivid green coloration. Translucent to transparent, complete all around, with flat, glassy termination faces and a bit of attached Graphite. 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.


M946 - Tremolite $ 75
Merelani Hills, Arusha, Tanzania
thumbnail - 2.1 x 0.8 x 0.4 cm


(click on an image to enlarge)

Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M946a.jpg] Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M946b.jpg] Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M946c.jpg] Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M946d.jpg]

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.


M947 - Tremolite $ 75
Merelani Hills, Arusha, Tanzania
thumbnail - 2.6 x 0.7 x 0.4 cm


(click on an image to enlarge)

Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M947a.jpg] Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M947b.jpg] Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M947c.jpg] Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M947d.jpg]

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.


M948 - Tremolite $ 125
Merelani Hills, Arusha, Tanzania
thumbnail - 2.1 x 0.9 x 0.5 cm


(click on an image to enlarge)

Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M948a.jpg] Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M948b.jpg] Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M948c.jpg]

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.


M949 - Tremolite $ 75
Merelani Hills, Arusha, Tanzania
thumbnail - 1.7 x 0.9 x 0.3 cm


(click on an image to enlarge)

Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M949a.jpg] Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M949b.jpg] Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M949c.jpg] Tremolite from Merelani Hills, Arusha, Tanzania [db_pics/pics/M949d.jpg]

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.


M950 - Gahnite $ 120 SOLD
Kagoro, Kaduna State, Nigeria
thumbnail - 0.9 x 0.9 x 0.9 cm


(click on an image to enlarge)

Gahnite from Kagoro, Kaduna State, Nigeria [db_pics/pics/M950a.jpg] Gahnite from Kagoro, Kaduna State, Nigeria [db_pics/pics/M950b.jpg] Gahnite from Kagoro, Kaduna State, Nigeria [db_pics/pics/M950c.jpg] Gahnite from Kagoro, Kaduna State, Nigeria [db_pics/pics/M950d.jpg]

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.

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