XXL HQ Grape Agate Lavender Crystal Cluster Crystal...

Grape agate is the commercial trade name for a rare, unique form of botryoidal (grape-like) purple chalcedony, a microcrystalline variety of quartz. The most sought-after varieties range from soft lilac and lavender to deep, dark purple. The color is caused by traces of iron and manganese within the crystal structure. Sometimes the spheres have a microscopically thin layer of sparkling crystal points, creating a beautiful “druzy” glitter effect. Unique locality: Most high-quality grape agate was only discovered around 2014 and is mined exclusively in the Mamuju region on the island of Sulawesi in Indonesia. The mineral forms deep in the cavities of volcanic rock (andesite). Over millions of years, silica-rich fluids have been deposited in layers into perfect spheres around a central point.Hardness: It has a rating of 6.5 to 7 on the Mohs hardness scale. However, the individual spheres can be fragile and may break if handled roughly.

Stima:450€

Vedi tutti gli oggetti diCatawikioEtnografia