Blue chalcedony long freeform cabochon druzy both outlet sides polished edges Unique lapidary 75 mm x 20 mm x 6 mm. 81 carats.

Blue Chalcedony is a rare variety of Chalcedony. It is a cryptocrystalline silicate mineral and a member of the Quartz family. It occurs in large mass formations perfect for cutting, crafting, and tumbling. The chalcedony on the market today comes from one single region in Turkey. This area is believed to have been extracting Blue Chalcedony since 2500 B.C. The word “chalcedony” itself is named after the ancient sea port of Chalcedon, which is now known as the city of Kadikoy. The blue hue of the stone occurs because of the “Tyndall effect”, which is defined as light scattering by colloid sized particles. The color can range from a light transparent blue to a solid baby or sky blue.

This listing is for a long Freeform rectangle of blue chalcedony Druzy. The dimensions of this gemstone or 75 mm x 20 mm x 6 mm deep. The weight of this gemstone is 81 carats. This piece is polished on the edges with both sides showing Druzy outlet. One side looks as though it's been coated with sugar. Very unique gemstone.