Spanish Pyrite Cubes on Basalt Matrix // 2.10 Lb.

This true museum quality specimen from Pune, India features multiple impressive, fully intact, prismatic sprays of scolecite - many near 360 degrees - on waxy, pale stilbite with hin...

This crayon-colored specimen of yellow brucite crystals on a substantial matrix displays a waxy luster. This cheery and unique piece will brighten up any fine minerals collection. D...

A world-class cluster of perfectly terminated cubic Pyrite crystals, interlocked on it's natural basalt matrix. This is an extremely large and unique piece - as less than a handful a...

Sharp cubic metallic pyrite crystal in tan-colored Basalt matrix. The pyrite crystal has smooth crystal faces with almost mirror-like luster, stands upright nicely without additional support. A must-have for any collection, these unique formations are formed through a process of precipitation and crystal growth within sedimentary and metamorphic rocks, taking millions of years and resulting in nearly perfect cubic-shaped crystals. Exhibiting unique cubic-shaped crystals that have taken millions of years to form a part of a complex geological process, this mineral is a must-have for any collector. Each tan-colored Basalt matrix hosts a sharp, metallic pyrite crystal that boasts of near-perfect cube shape with smooth, mirror-like luster. Due to its smooth crystal faces, this mineral stands...