Kornerupine Gemstone

Kornerupine Gemstone

Kornerupine is named after the Danish explorer, geologist and artist Nikolaus Kornerup. First described in 1887, in Fiskernaes, Greenland, Kornerupine is a rare translucent to transparent gemstone.

Kornerupine is of a magnesium aluminum borate silicate chemical composition. It occurs in an orthorhombic, long prisms crystal structure. It comes in yellowish-green, brownish-green, green, yellow, blue, pink and white colors.

Kornerupine Gemstone has a hardness ranging from 6.5 to 7 on the Mohs scale. It has a glass-like luster.

The green variety of Kornerupine coming from Kenya gives off a yellow fluorescence.

Due to its extreme rarity, Kornerupine, is primarily a gem collectors’ item. However new deposits found in Africa of rare colorful deposits have increased the demand and popularity of Kornerupine jewelry.

Because of its long prism structure, Kornerupine is also sold under the trade name of Prismatine.

Kornerupine displays a strong pleochroism usually yellowish green to reddish brown in color. When cut en cabochon, on some exceptionally rare occasions, specimens of Kornerupine may exhibit the Cat’s Eye effect. Also, in Mogok, Burma the extremely rare Star Kornerupine has been discovered.

Kornerupine gets its green color due to the traces of Vanadium. It looks very similar to Epidote, Tourmaline and Andalusite. However, Kornerupine can be distinguished from other similar gemstones by its strong pleochroism (a color-change phenomena viewed from different angles especially with polarized light) and glass-like (vitreous) luster. Kornerupine can also further be distinguished by its long prism structure and its moderately good hardness (6.5 to 7 on the Mohs scale) and its refractive index that ranges from 1.660 to 1.699 (which is similar to Spodumene).

The most sought after Kornerupine is the transparent to translucent greens and yellows. The emerald-green and blue stones are the most valuable.

Most small-sized Kornerupine are eye clean while inclusions can be seen in the larger gemstones.

Clean and transparent to translucent Kornerupine are usually faceted. The translucent to opaque materials are regularly cut en cabochon, more so the Kornerupine that displays the Cat’s Eye and Star effect; other shapes that Kornerupine are fashioned include ovals, pears, cushions and rounds.

Kornerupine is not known to be treated or enhanced in any way.

Kornerupine is used in crystal healing to help stabilize emotions. It helps calm those negative strong feelings such as anger, jealousy and fear. It also helps resolve indecision and inaction and aid in problem-solving by going to the root of the problem. Kornerupine can help transform the personality and character of the wearer. By helping refine the wearer’s character, and free the person from things that are oppressive such as fears and indecisions. Kornerupine helps the wearer be in touch of her inner self and come to the understanding of the “why” of his or her sacred existence. It also induces unconditional love for others.

Most Kornerupine gemstones are quite small and usually used for earrings and rings. However, Kornerupine often is tumbled and beaded into necklaces and bracelets. The larger specimens are set as pins, brooches or pendants.

Due to its extreme rarity, Kornerupine is not a well-known gemstone. Though it has a hardness similar to quartz, nevertheless it comes with a brittle tenacity, good cleavage, uneven, conchoidal fracture which makes it a little less durable than quartz. Thus, care should be taken in order to prevent fracturing your gorgeous Kornerupine gemstone.

To clean your beautiful Kornerupine gemstone simply use running water and mild soap. Use a soft cloth to wipe down and remember to rinse well in order to remove any soapy residue. Avoid spraying perfume or hairspray on your gemstone and jewelry, for it is well known that the chemicals found in perfume and hairspray can cause corrosion.

Kornerupine deposits can be found in Fiskernaes in Southwest Greenland where it was first described; also, in Sri Lanka, Australia, Burma (Myanmar), Canada (Quebec), Kenya, Madagascar, South Africa, Tanzania and Norway.

Today, Sri Lanka is the main source for gemstone quality fine yellow-green to yellow-brown Kornerupine. African Kornerupine gemstones such as those found in deposits in Tanzania and Madagascar come in small sizes and they occur with rare blue or bluish-green color, usually with purple color change.