A large aesthetic radiating cluster of metallic-gray Stibnite crystals on the leading edge of the matrix. In addition to the focal cluster are numerous miniature Stibnite blades throughout the matrix. This piece is very unique and aesthetic - the luster, crystal formation, symmetry and...

An exceptional specimen featuring numerous intersecting sprays of acicular steel-gray Stibnite crystals with a partial coating of colorless Quartz all on a white/gray matrix. The metallic luster of the Stibnite is incredible, but then partially coated with Quartz - it looks like snow! A...

A vary large, lustrous cluster of intersecting Pyrite cubo-octohedral crystals. The crystals are large and well formed with complex surface textures which make for a unique and aesthetic piece. The metallic luster is mirror-like and exceptional. A great piece in excellent condition. Location: Huanzala Mine,...

A large, lustrous cluster of intersecting Pyrite cubo-octohedral crystals. The crystals are very large, well formed and with complex surface textures which make for a unique and aesthetic piece. The metallic luster is mirror-like and exceptional. A great piece in excellent condition. Location: Huanzala Mine,...

A spherical nodule of golden-metallic Pyrite crystals. The nodule is covered on all sides with Pyrite crystals. Very unique formation and in excellent condition. Location: Otjihase Mine, Von Francois Farm 60, Windhoek Rural, Khomas Region, Namibia Size: 3.8 x 3.2 x 2.5 cm

A large, solid mass of copper-colored Bornite from Tsumeb. The metallic luster and iridescence is exceptional, earning its nickname “Peacock Ore.” This particular piece is naturally colored (vs. a bath in acid). Location: Brandberg, Namibia Size: 7.5 x 4.5 x 5 cm

Pyrite cubes never get old - they are completely natural, and thus a favorite of collectors. This particular piece hosts two large intersecting Pyrite cubes - both perfect and just amazing! The perfect cubic formation, metallic luster and contrast with the matrix makes for...

A large cluster of intergrown, stepped-growth Chalcopyrite crystals with Siderite on a contrasting Dolomite Matrix. The Chalcopyrite has a golden metallic luster which accentuates the stepped-growth crystal lines. A very unique and aesthetic piece with great luster, color and contrast. In excellent condition. Location: Panasqueira...

A cabinet-sized specimen featuring a large, well formed, striated modified Pyrite cube on a bed of transparent, colorless needle Quartz crystals. The Pyrite crystal has a brassy color and a metallic luster - a beautiful piece with amazing luster, contrast and balance - in...

A very aesthetic piece featuring a complex cluster of intersecting, brilliant-metallic Galena crystals perched perfectly on top of the matrix. Beautiful luster, contrast and symmetry. A great piece in excellent condition. Location: Tri-State Mining Area, Galena, Illinois, USA Size: 7.2 x 6.5 x 3 cm

A plate of light-brown Chert hosting several sharp cubic Galena crystals, including a few miniature Galena crystals on the bottom of the matrix. An excellent specimen from the now-closed mines of Picher, Oklahoma. Location: Picher, Ottowa County, Oklahoma, USA Size: 10.5 x 7 x 3.5 cm...

This is a superb specimen of cuboctohedral (cubic with octahedral corners) Galena from the Gidiursko Mine, Bulgaria. The Galena crystals from this mine are often sharp with a brilliant, metallic/mirror-like luster. Add to that numerous radiating clusters of contrasting, transparent, colorless needle-Quartz and you...

Pyrite cubes never get old. There are some that insist these things are fabricated, but they are completely natural, and thus a favorite of collectors. This particular piece hosts 3 lustrous Pyrite cubes, 3 cm, 2.5 cm and 2 cm., all in excellent condition. Great piece!...

The piece features spectacular, deep-red, transparent and lustrous Sphalerite crystals on Quartz. There are numerous Sphalerite crystals throughout the piece, and they are gemmy and sharp and many are unusually large. The front is covered with a reddish microcrystalline Quartz/Sphalerite while the back is...

This extra large piece hosts 2 generations of Calcite: the first generation is featured on the front which is a layer of bright white, highly lustrous Calcite crystals, and then on the side and back is a second generation of beige colored microcrystalline Calcite...

Pyrite cubes never get old. There are some that insist these things are fabricated, but they are completely natural, and thus a favorite of collectors. This particular piece hosts a huge 3.7 cm Pyrite cube, and it is perfect - just amazing! Location: Navajun, Spain...

Pyrite cubes never get old. There are some that insist these things are fabricated, but they are completely natural, and thus a favorite of collectors. This particular piece hosts a huge 4 cm Pyrite cube. There are two minor contacts (the one on top...

Pyrite cubes never get old. There are some that insist these things are fabricated, but they are completely natural, and thus a favorite of collectors. This particular piece hosts a huge 4 cm Pyrite cube, and it is perfect - just amazing! Location: Navajun, Spain...

Pyrite cubes never get old. There are some that insist these things are fabricated, but they are completely natural, and thus a favorite of collectors. This particular piece hosts a large 3 cm Pyrite cube, and it is perfect - just amazing! Location: Navajun, Spain...

Pyrite cubes never get old. There are some that insist these things are fabricated, but they are completely natural, and thus a favorite of collectors. This particular piece hosts a huge 4 cm Pyrite cube, and it is perfect - just amazing! Location: Navajun, Spain...

Pyrite cubes never get old. There are some that insist these things are fabricated, but they are completely natural, and thus a favorite of collectors. This particular piece hosts a 2.5 cm Pyrite cube and a large 3 cm intergrown cube - both perfect...

I’m not sure where to begin with this piece - it’s another one of my favorites and I notice something new every time I study it. Besides being huge, the most obvious feature are the Stibnite clusters - their delicateness, metallic luster and flower-like...

A showy cluster of Sphalerite crystals on quartz, with red microcrystalline quartz crystals intermingled with, and in some instances, coating several of the Sphalerite crystals, along with numerous Calcite crystals populating the piece, especially the back. The Sphalerite crystals are a deep reddish-brown (see...