Nifontovite – Exceptional Gem-Clear Elongated Prismatic Crystal

Specifications

Species: Nifontovite
Origin: Charcas Mining District, Charcas, San Luis Potosí, Mexico
Dimensions: 9.0 × 1.6 × 1.2 cm
Weight: 20 g

Description

This elegant and highly unusual specimen features a remarkably elongated prismatic crystal of the rare calcium borate mineral Nifontovite, displaying exceptional transparency and refined crystal architecture. Measuring an impressive 9 cm in length, the crystal rises as a slender blade-like prism with a sharply defined termination, a form that is seldom encountered for the species. The crystal is water-clear to perfectly colorless, exhibiting a bright vitreous (glassy) luster that enhances its gem-like appearance. Fine parallel growth striations are visible along the prism faces, particularly toward the termination, adding subtle texture and visual interest while confirming natural growth. Light passes cleanly through the interior, revealing a near absence of inclusions—an extraordinary quality for Nifontovite. Near the base, a small secondary crystal emerges alongside the primary prism, adding dimension and aesthetic balance to the specimen while preserving the dramatic vertical profile of the main crystal. The base shows natural contact where the crystal detached from the host matrix, allowing the specimen to stand upright and display its full elongated geometry. Nifontovite was first described in 1961 from the Northern Ural Mountains of Russia, and for decades remained known only from limited occurrences such as the Fuka Mine in Japan, where it typically formed opaque lamellar aggregates rather than discrete crystals. The more recent discoveries at Charcas, Mexico produced the first truly transparent, well-formed crystals, instantly elevating the species into the realm of serious collector interest. Crystals approaching this length, clarity, and completeness of termination are exceptionally scarce. The specimen’s striking proportions, glass-like transparency, and textbook prismatic habit make it a standout example of the species and an important addition to any advanced mineral collection specializing in rare borates or unusual crystal habits.

Click any image to view in gallery