531 results found for “mixed-minerals*”

This aesthetic piece features a matrix of clear, crystalline Quartz hosting two black, lustrous, mirror-like Cassiterite crystals. The contrast is amazing! The large, focal Cassiterite crystal is striking, especially against the Quartz backdrop. In excellent condition. Location: Viloco Mine, Loayza Province, La Paz Department, Bolivia...

From a relatively new discovery in Peru - this beautiful, all natural pink Opal has a botryoidal-like form, with a soft, satiny luster. It is gem quality and hard to find - a striking piece with great color and luster. In excellent condition. Location: Pisco...

An aesthetic, cabinet-sized specimen featuring a colorful matrix hosting a perfectly centered dense cluster/ridge of lustrous, transparent to translucent, rich-green Dioptase crystals. Truly a beautiful piece with amazing color, luster, gemminess and balance! Size: test Location: test

A very colorful piece featuring deep-yellow/golden botryoidal Mimetite crystals on a red-brown matrix, along with numerous transparent Calcite rhombohedrons scattered throughout the piece. I also find the unusual shape of the piece an added attraction. A very aesthetic piece with great color, contrast, luster...

This is a massive cluster of countless intersecting, doubly-terminated prismatic Epidote crystals (ok, maybe not countless, but way more than I care to count . . . ). The crystals have striated faces, a deep green color and are in excellent condition. There is...

This Hyalite Opal is exceptionally large with the vug entirely coated with a massive and thick layer of transparent, colorless botryoidal Hyalite Opal. The Hyalite exhibits intense green fluorescence when exposed to ultraviolet light. Additionally, the adjoining brown matrix has been polished to highlight...

A very colorful and large piece featuring deep-yellow/golden botryoidal Mimetite crystals on a red-brown matrix, partially coated with transparent Calcite rhombohedrons. The luster with the addition of the Calcite crystals is outstanding and only adds to the depth of the Mimetite’s golden color. A...

A very aesthetic and colorful specimen featuring sparkling, translucent pink crystallized Rhodochrosite over translucent, clear to white microcrystalline Quartz on matrix. For an added bonus, there’s a cluster of cream-colored spherical aggregates of Calcite on the Rhodo. A beautiful and uncommon piece with great...

This is a huge, incredible plate of Vanadinite. I have not seen a larger nor nicer specimen. The hexagonal crystals are deep red, translucent and gemmy with a glassy luster. The contrast is perfect between the deep red and the light colored matrix. It...

A beautiful specimen of a classic Selenite Flower. This piece has numerous lustrous, golden Selenite twins emanating from three intersecting clusters of smaller Selenite crystals. It’s hard to find these pieces damage free, but this one certainly is. It displays perfectly, is incredibly aesthetic...

A very large and beautiful piece that features a prominent vein of Rhodochrosite in a matrix of Quartz, Silver Tetrahedrite, Galena and Chalcopyrite. The Rhodochrosite is translucent, the color is a classic reddish-pink and the rhombohedral cleavage can be clearly seen as result of...

A stunning natural Opal (some matrix is still attached) from Welo, Ethiopia. Again, this is its natural form, unpolished. To be honest with you, I prefer this natural Opal over the polished version. (Although, I wisely wouldn’t consider giving this to my wife on...

A superb large specimen of lustrous, white bladed Albite hosting numerous hexagonal crystals of silvery Muscovite Mica, with the focal cluster featuring several large, intergrown Muscovite hexagonal crystals. The luster, symmetry and contrast is amazing, and the Muscovite crystal centerpiece really stands out! In...

An incredible, exceptionally large, lustrous fan-shaped cluster of elongated, translucent, dark-green Vivianite crystals emanating from a brown matrix vug coated with a thin layer of contrasting velvety-black Goethite. This piece is a one-of-a-kind: The crystals are striking, pristine and large, the contrast and symmetry...

I have some specimens from Red River that the Selenite ball is completely covered with golden Selenite crystal “fishtails.” But for some reason this piece catches my eye. For starters, the two Selenite crystals exhibit the classic “fishtail” formation, they’re sharp, transparent and they’re...