99^€

Amethyst druse with calcite crystals

Weight 820 gr

CHARACTERISTICS
Weight	820 gr
Size	110x95x65 mm
Reference	220807774
Mineral	variety of mineral Amethyst
Mineral 2	mineral Calcite
Category	Crystals and geodes
Group	Druses
Country	Uruguay

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.
Click to zoom

Formula SiO₂] AMETHYST
O	Oxygen	Other no metal	53.25%
Si	Silicon	Metalloids	46.74%
			100%
Amethyst is a mineral that belongs to a family of silicate crystalline oxides, composed mainly of silica and oxygen. Its mutable color, ranging from dark purple to mauve, is due to the presence of iron and traces of other elements. Amethyst has a hardness of 7 on the Mohs scale and forms in igneous, volcanic and sedimentary rocks. It is also found in hydrothermal veins, veins and cavities in volcanic rocks that have experienced high temperatures and high pressures. Amethyst has been used for centuries as a gemstone and remains one of the most popular gemstones today. It is also used in the mining industry and as a decorative material. It is sometimes even used in the manufacture of optical instruments. Also, amethyst is traditionally considered a symbol of wisdom, spiritual strength and protection.
Formula CaCO₃] CALCITE
O	Oxygen	Other no metal	47.95%
Ca	Calcium	Alkaline earth metal	40.04%
C	Carbon	Other no metal	12%
			100%
Calcite is a common mineral in many sedimentary rocks and metamorphic rocks. It is also present in soils, marine sediments and lakes and saline lakes. It is the main component of limestone. Calcite is a mineral from the carbonate family. It has a hexagonal crystal structure and is transparent to translucent. Its color varies from white to light gray, yellow, orange and even red. It has an average hardness of 3 on the Mohs scale. Calcite is mainly produced by biogenic and chemical processes. When waters move through limestone and interact with carbon dioxide, calcite is formed. It can also be formed by volcanic processes, fault movements or soluble processes. Calcite is widely used in the chemical, food, medicine and building materials industry. One of the main uses of calcite is to produce lime for road surfacing. Calcite is also used for the manufacture of ceramic products. In addition, it is sometimes used in optical systems for its optical properties.

Return and delivery

Shipping time
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.

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

Payment methods

Paypal

Visa

Mastercard

Amex

Chèque

Virement