This amethyst stalactite slice from Southern Paraná Basalt Basin, Artigas, Uruguay features a beautifully banded cross section. The gemstone is tra...

A nicely banded cross section of an amethyst stalactite crystal from Southern Paraná Basalt Basin, Artigas, Uruguay   Gem translucent slice with de...

This amethyst stalactite slice from Southern Paraná Basalt Basin, Artigas, Uruguay features a beautifully banded cross section. The gemstone is tra...

This amethyst stalactite slice from Southern Paraná Basalt Basin, Artigas, Uruguay features a beautifully banded cross section. The gemstone is tra...

This amethyst stalactite slice from Southern Paraná Basalt Basin, Artigas, Uruguay features a beautifully banded cross section. The gemstone is tra...

A nicely banded cross section of an amethyst stalactite flower crystal from Southern Paraná Basalt Basin, Artigas, Uruguay Amethyst is a very power...

A beautiful classic specimen of lustrous Thunder Bay amethyst with rich inclusions  of brick red hematite. Distinctive solid even brick red color t...

Stunning 21ct custom rectangular cut Ametrine gemstone, with it's rectangular step cut gives the stone it’s internal brilliance. This huge gemstone...

From Stanley Butte, San Carlos Indian Reservation, Graham County, Arizona Well crystallized, classic cluster of greenish-brown andradite garnet cry...

From Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia Cluster of several glassy anglesite crystals. The anglesite has a pale yellow color wi...

From Lonavala Quarry, Pune District, Maharashtra, India Lustrous transparent-to-translucent large green apophyllite crystals overgrown on matrix. T...

From Jalgaon, Aurangabad District, Maharastra, India Lustrous complex cluster of intersecting transparent colorless apophyllite crystals completely...

A huge, museum-quality geode displaying a wall of perfectly terminated pink Stillbite with white Apophyllite. This piece also shows two (2) perfect...

Pristine cluster of colorless apophyllite crystals. The crystals vary from milky white to water-clear at the terminations. this is a stalactitic fo...

From Skardu Road, Baltistan, Northern Areas, Pakistan Large interesting quartz crystals with a cluster of microline at the center with gem transpar...

From Nagar, Hunza Valley, Gilgit-Baltistan, PakistanLustrous transparent aquamarine crystal with silvery muscovite mica crystals. The aquamarine ar...

From Shigar Valley, Shigar District, Gilgit-Baltistan, Pakistan Cluster of many elongated aquamarine crystals with lustrous black schorl tourmaline...

From Nuestra Señora del Carmen Mines, La Celia lamproite outcrops, Jumilla, Murcia, SpainLustrous interconnected purple-gray crystals with minor ma...

From Deveti Septemvri Mine, Madan District, Rhodope Mountains, Bulgariaina Rare large specimen of crystals of arsenopyrite with quartz. The arseno...

From Huanggang Mine, Kèshíkèténg Qí, Chifeng, Inner Mongolia, China Large specimen of silvery metallic luster arsenopyrite crystals in a subparall...

From Huanggang Mine, Kèshíkèténg Qí, Chifeng, Inner Mongolia, China Large specimen of silvery metallic luster arsenopyrite crystals in a subparall...

Trilobites, an early arthropod relative of spiders, horseshoe crabs, and scorpions, preserved in this level of detail only occurred as a result of ...

Trilobites, an early arthropod relative of spiders, horseshoe crabs, and scorpions, preserved in this level of detail only occurred as a result of ...

From Ahouli Mines, Aouli, 7 km northeast of Mibladen, Zeida-Aouli-Mibladen belt, Midelt Province, Morocco Rich specimen of bright-blue lustrous azu...