description Kornerupine Overview
Kornerupine is a rare magnesium aluminum borosilicate mineral that crystallizes in the orthorhombic system. Gem-quality material is commonly green, brown, yellow, or combinations of these colors, and strong pleochroism can make different colors visible as the stone is turned. Some transparent stones show a cat's-eye effect when cut as cabochons, making kornerupine a collector and jewelry gemstone.
help Kornerupine FAQ
What is kornerupine?
Kornerupine is a rare magnesium aluminum borosilicate mineral. It crystallizes in the orthorhombic system.
What colors can gem-quality kornerupine have?
Gem-quality material is commonly green, brown, yellow, or a combination of those colors. The exact appearance depends on composition and the direction in which the stone is viewed.
Why does kornerupine show different colors when turned?
Kornerupine can have strong pleochroism, meaning it shows different colors from different viewing directions. Turning a cut stone can therefore reveal green, brown, or yellow tones.
Is kornerupine a common jewelry stone?
No. It is considered a rare gemstone, so clean and strongly colored faceted material is less common than quartz or garnet. It is most often collected or used in specialist jewelry.
explore Explore More
Reviews & Comments
Write a Review
Be the first to review
Share your thoughts with the community and help others make better decisions.
