Black Moonstone Madagascar
Weight 1.24 kg
| CHARACTERISTICS | |
| Weight | 1240 gr. 1.24 kg |
| Size | max 12 cm 95x110x115 mm |
| Reference | 240813730 |
| Mineral | mineral species Microcline |
| Category | Objects and fossils |
| Group | Pyramids |
| Country |
 Madagascar
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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 KAlSi3O8] MICROCLINE | |||
| O | Oxygen | Other no metal | 45.99% |
| Si | Silicon | Metalloids | 30.27% |
| K | Potassium | Alkali metal | 14.05% |
| Al | Aluminum | Poor metal | 9.69% |
| 100% | |||
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Microcline is a mineral belonging to the feldspar group. Its chemical formula indicates that it is mainly composed of potassium, aluminum, silicon and oxygen. This mineral is generally formed under conditions of slow cooling of plutonic igneous rocks such as granites, granodiorites or syenites.
Microcline is a polymorph of orthoclase, meaning that it has the same chemical composition but a different crystal structure. This structural difference is due to a more ordered atomic arrangement in microcline, which makes it more stable at low temperatures than orthoclase. The best-known variety of microcline is amazonite, characterized by its green color. This coloration is due to very small amounts of impurities, including lead and water.
Crystallographically, microcline belongs to the triclinic crystal system. Its crystals are usually prismatic, elongated or flattened, and can form twins. Microcline often has a perthitic structure, characterized by lamellar outgrowths of another feldspar (albite) inside its crystals.
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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.
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