Grape chalcedony

Grape chalcedony is one of the varieties of quartz. It consists of spherical aggregates called spherulites that precipitated from SiO2-rich gelatinous solutions. The individual spheres, measuring up to 1 cm in size, are composed of fine filaments of the same length attached to each other. Grape chalcedonies have a soft to intense purple or green colour. The beads are bonded to each other or to the rock backing in a way that resembles grapes. Like any form of quartz, it is very durable mechanically and chemically.

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Locations in the Czech Republic: no finds, only kidney-shaped aggregates in the melaphyres of Podkrkonoší

Locations abroad: Mamuju, west part of Sulawesi, Indonesia

Possibility of confusion: strengite - purple phosphate, small spherulites, very rare, variscite - phosphate, low hardness, brittle

Astrology: Capricorn, Cancer, Sagittarius

Chakra: by color; violet - thymus chakra, green - heart chakra

Esoteric properties: helps to connect with higher plane of thought and intuition, find inner peace, improves communication with loved ones, has protective properties.

Health esoteric properties: promotes metabolism regulation, helps to lower blood pressure and reduces sensitivity to weather changes.