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Home / Gem Library / Gemstones Varieties / Kornerupine April 20, 2024

Natural Kornerupine

A rare magnesium iron borosilicate, kornerupine has been faceted as a gem, but its interest is mainly for gemologists and collectors. The mineral was discovered in Greenland in 1884 as a pale green to sage green material with a radiating columnar habit in translucent to transparent pieces. It was named in honor of the Danish geologist, Andreas Nikolaus Kornerup. The material from Greenland turned out to be scarce and no other significant deposits were ever reported.

  • There are 14 Kornerupine gemstones available at
  • Kornerupine(s) are organized in the following categories: Single,  gemstones.
  • Our most expensive Kornerupine is USD 3599.00 and largest Kornerupine weight is CTS 19.99.
  • Our cheapest Kornerupine is USD 34.40 and smallest Kornerupine weight is CTS 0.86.

Find your Kornerupine

Our Kornerupine(s) are available in various shapes, sizes and colors. 14 Kornerupine(s), too many to look through? You may select any combination of search options. Colors grade into each other and you can search for more than one color at once. For a better selection, try selecting two or three colors, -- your first choice plus the two closest colors.

Color range
yellow-green or green-yellow
strongly yellowish green
bluish green
yellowish green
very strongly bluish green
slightly yellowish green

Kornerupine Profile

Color information: Brown, brownish red, yellow-green, light green, blue green
Refractive Index: 1.665 Ė 1.683
Hardness: 7
Density: 3.25 - 3.35
Crystal Group: Orthorhombic
Ocurrence: Sri Lanka, Tanzania, Kenya, Madagascar, and Myanmar.
Sign of the Zodiac: N/A
Month of the year: N/A
Kornerupine has also been unearthed in Madagascar, Sri Lanka, Myanmar, Kenya, and Tanzania. Kornerupine catís eyes have been found in surprisingly large quantities in Sri Lanka.

Kornerupine is strongly pleochroic but most of the stones end up showing brown or brownish green. Occasional highly saturated green and blue stones from East Africa have been unearthed but very few are clean in sizes over 1/2ct. The beautiful colors of these stones has been attributed to the presence of chromium or vanadium.

With a hardness of 7 and no significant cleavage, kornerupine is hard enough to be used in most kinds of jewelry but it will never be popular due to its rarity.

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Kornerupine range/
Kornerupine Single
Kornerupine Single Pear Eye clean to Slightly included
Size: 23.00 X 14.80 MM
Weight: 19.990 CTS
Shape: Pear
Clarity: Eye clean to Slightly included
Usually ships within 24 hours
USD 3599.00
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Kornerupine Single
Kornerupine Single Round Moderately included
Size: 5.80 X 5.80 MM
Weight: 0.860 CTS
Shape: Round
Clarity: Moderately included
Usually ships within 24 hours
USD 34.40
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