Extremely rare Kornerupine crystal 3.26 carats - top quality - Height: 10.7 mm - Width: 7.3 mm- 0.65 g - (1)

Visual presentation

Superb rough crystal of Kornerupine from Tanzania, displaying a subtle and luminous light green color. Its transparency and natural structure highlight its discreet sparkle and authentic character.

Technical specifications

Dimensions: 10.7 × 7.3 × 5.1 mm
Weight: 3.26 carats
Origin: Tanzania
Color: Light green, slightly nuanced.
Appearance: Cristal brut, excellent for a specialized collection.


Remarkable points


Extreme rarity: Kornerupine is an extremely rare stone, much less known to the general public than classic gemstones like emeralds or garnets.

Pleochroic properties: It exhibits a pronounced pleochroism, showing different shades depending on the viewing angle and light (green, brown, sometimes blue-green or violet).

Historical context: Initially discovered in Sri Lanka in the 19th century, kornerupine is named after Danish geologist Andreas Nikolaus Kornerup. Since then, its exploitable deposits have remained very rare.

Gemstone quality: With its light color and vitreous luster, this specimen shows potential in gemology, both for cutting and study.


Geological and gemmological context


Kornerupine is an aluminum and boron silicate that forms under rare metamorphic conditions in the presence of boron. Its deposits are found only in a few regions around the world: Tanzania, Madagascar, Sri Lanka, Myanmar, and some isolated localities.
Its rare combination of color, pleochroism, and hardness (7 on the Mohs scale) makes it a highly sought-after stone among collectors and lapidaries.


Conclusion


An extremely rare and sought-after piece, ideal for enriching a collection of exceptional gems. With its fascinating pleochroism and prestigious origin, this Tanzanian kornerupine embodies the meeting of rarity, mineral beauty, and gemological history.



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