Nail Head Calcite | Tri-State Barite glassy calcite crystals

glassy calcite crystals

This polished specimen displays an ancient algal colony fossil from the Pennsylvanian Period (approximately 323–299 million years ago)

deep-green malachite with the classic “velvet” texture for which Congo malachite is renowned

and a well-formed blade retaining natural growth lines and texture

Nail Head Calcite | Tri-State Barite glassy calcite crystalsThis specimen features sharp, golden nail head calcite crystals from the historic Tri State mining district of Missouri, Kansas, and Oklahoma. The distinctive flattened crystal habit gives the appearance of nail heads, a signature form from this region. Under ultraviolet light, the calcite fluoresces, adding an extra dimension to its natural beauty. A fine example of classic Tri State mineralogy and vintage American mining heritage. This item is 3. 25