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This freeform specimen showcases deep purple amethyst crystals that have been carefully polished to highlight their rich color. The crystals still retain their volcanic basalt matrix,...

This stunning sculpture, known as Sugar Rainbow, features amethyst crystals set against a pale yellow, champagne-colored background. It retains its volcanic basalt matrix and has a...

This polished amethyst geode fragment, known as a 'sugar' piece, showcases a vibrant Rainbow-colored cavity lined with crystals set against a pink background. It retains its...

This polished amethyst egg features lavender-toned crystals and retains its volcanic basalt matrix. The shell is composed of agate. Two complete, opaque, uniaxial calcite crystals, with...

This polished amethyst egg, known as a 'rainbow' type, features crystals set against a pink background. It retains its volcanic basalt matrix. The shell of the...

This self-standing, carved piece features lavender amethyst crystals still attached to its volcanic basalt matrix. A single-generation, transparent calcite formation, though incomplete, reveals a captivating phantom...

This polished amethyst cavity, also known as a geode, showcases a stunning rainbow effect with crystals set against a pink and lavender background. The natural volcanic...

This stunning mineral specimen features a vibrant, self-standing amethyst formation with a rainbow hue, set against a pink background. The piece retains its natural volcanic basalt...

This polished amethyst sculpture showcases a vibrant rainbow effect within a soothing mint-green background that is visible through the crystal. The piece retains its volcanic basalt...

This stunning amethyst sculpture features purple crystals and has been fully polished. Its body is composed of crystalline quartz and agate, while the top is capped...

This exquisite piece features a multigenerational calcite formation, complete with all its faces and black inclusions. The calcite has two distinct generations: the first is transparent...

A natural calcite specimen from Artigas, Uruguay. This piece showcases the unique characteristics of calcite, a popular mineral among collectors. Weight: 2.25 kg (4.95 lb) Dimensions...