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gemstone main cabochon creation
min data

Mineral: quartz
Gem: brazilian agate (cryptocrystalline)
Size: 22x42 mm & 32x52 mm & 27x41mm
& 21x 37 mm
Carat: 50+ ct & 57+ ct & 39.8 ct & 28.8 ct
Cut: freeform cabochon
Origin: Brazil
General Info: Agate (achates) was named from the river Achates, now the Drillo, in Sicily, where the stone was first identified. It is cryptocrystalline quartz (micro crystals) usually with a banded pattern (although not always).
Additional Information
Found in nodules and a very dense agate. Comes in many colors with banding and fortification very common. May also be found with parallel layers in a portion or all of a nodule. The centers may be open with crystal pockets or closed. These agates can be found to extremely large size.

All stones cut by author. Stones 3 and 4 were hand shaped then polished in vibratory tumbler.