299^€

Grape Cluster Chalcedony

Weight 265 gr

CHARACTERISTICS
Weight	265 gr
Size	90x60x60 mm
Reference	240813445
Mineral	mineral Chalcedony cluster
Category	Crystals and geodes
Group	Free crystals
Country	Indonesia

Contractual photos showing the object you will receive when ordering. the photos were taken in order to obtain the most faithful possible rendering of the object.
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Formula SiO₂] CHALCEDONY CLUSTER
O	Oxygen	Other no metal	53.26%
Si	Silicon	Metalloids	46.74%
			100%
Botryoidal chalcedony is a microcrystalline variety of quartz, a mineral composed of silica. Its name comes from its characteristic grape-like appearance, hence its nickname "grape agate". This particular morphology is due to a specific crystal growth process, where small quartz spherules have agglomerated to form rounded structures. Botryoidal chalcedony is usually formed in cavities in volcanic or sedimentary rocks, by slow precipitation of silica dissolved in water. Botryoidal chalcedony deposits are often associated with other minerals such as amethyst or agate. The most beautiful specimens come from volcanic regions, such as Iceland or Indonesia. Botryoidal chalcedony has a high hardness and a variable density depending on the amount of impurities present. Its color can range from white to gray, through blue, brown or black. Quality specimens are often used in jewelry and decoration. Botryoidal chalcedony is appreciated for its original aesthetic appearance and its resistance.

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Your orders are usually shipped the day of the order and at the latest after 2 working days.

Delivery delay
Once the package is supported by the postal service, delivery times are those announced by the Post (letter followed or Colissimo followed). Parcel shipping from France.

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Our refund and return policy lasts 14 days. You can read the details on the "return and delivery" page.

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