0.14 ct JOHACHIDOLITE – MYANMAR

Johachidolite (Myanmar)

Johachidolite from the legendary Mogok Stone Tract represents the “borate-transparency” peak of the mineral world. An extremely rare calcium aluminum borate, it is a species I have always respected for its “electric-citrine” to “pale-champagne” saturation and its status as one of the rarest gemstones on Earth. For the specialist, a top-tier Burmese Johachidolite is a prize of extreme chemical focus; it offers a vitreous luster and a “luminous” presence that makes it a true “high-vibration” asset for the systematic vault. As an artist, I find the “liquid-light” depth and the “spectral” brilliance of these crystals to be one of nature’s most sophisticated and “refined” palettes.

The Heritage & Discovery

Historical Significance Johachidolite is a vital species for understanding the concentration of boron in high-grade metamorphic environments. Historically, it was named after its type locality, Johachido (in North Korea), where it was first discovered as massive, opaque material. In the world of fine minerals, it is celebrated for its natural, “solar-neon” pigment, which stands as a symbol of mental clarity and structural discipline. It serves as a reminder that the “extreme” geological conditions of the Burmese skarns can produce extraordinary optical results when boron and aluminum are forged in the intense heat of regional metamorphism.

Discovery While the species was first identified in the 1940s, the “gem-grade” discoveries in Myanmar redefined the mineralogical benchmark for the species. Scientifically, it is an anhydrous borate. Its discovery in the Mogok valley provided mineralogists with the first clear look at the species’ potential for “water-clear,” euhedral crystals. My own respect for this material grew from observing its “fluorescent” depth; specifically, the way a top-tier Johachidolite handles light—often exhibiting a “sharp” blue fluorescence under short-wave UV—is a visual impact that is unmistakable to the trained eye.

Important Mines The undisputed world capital for the finest, “water-clear” Johachidolite is the Mogok Stone Tract in the Pyin-Oo-Lwin District, Myanmar, specifically from areas like the Pyaung-gaung and Dattaw mines. These specimens set the global benchmark for color purity and “sharp” crystal architecture. I also have a high regard for the rare finds from the Kyuak-pyat-theat area. For the vault, I prioritize the Burmese material for its unmatched “citrine-depth” and its status as a rare-location masterpiece of the borate group.

Mineralogical Profile

Description Johachidolite is a calcium aluminum borate that crystallizes in the orthorhombic system. It sits at a 6.5 to 7 on the Mohs scale, making it a durable mineral, though its “brittle” nature means it must be handled with care to preserve its “razor-sharp” edges and vitreous surfaces. It is characterized by its vitreous luster and its unmistakable, “citrine-yellow to colorless” color palette.

One of its most identifying traits is its orthorhombic crystal habit and its association with boron-rich metamorphic rocks. It has a high refractive index (n approx 1.71 to 1.72) and a specific gravity (SG approx 3.4). Because it forms in the same environments as Ruby and Spinel, it is often found in association with Phlogopite, Calcite, and Forsterite. When I select a piece for the collection, I look for “pure” transparency and the rarest “neon-yellow” saturation, as these highlight the sophisticated, three-dimensional geometry of the mineral’s growth. It is a dense, high-vibration mineral that offers a unique, “aqueous-neon” beauty unlike any other borate variety.

Chemical Formula CaAlB3O7