What is the luster of Chrome?
What is the luster of Chrome?
Chromite is an oxide mineral composed of chromium, iron, and oxygen (FeCr2O4). It is dark gray to black in color with a metallic to submetallic luster and a high specific gravity….
| Physical Properties of Chromite | |
|---|---|
| Chemical Classification | Oxide |
| Streak | Dark brown |
| Luster | Metallic to submetallic |
| Diaphaneity | Opaque |
Is chromite a mineral or rock?
Chromite is a cumulate mineral which is found in ultramafic portions of layered mafic intrusions or in serpentines and other metamorphic rocks derived from the alteration of ultrabasic rocks.
How is chromite extracted?
Mining of chromite is carried out by open-pit and underground mining. Whereas open-pit mining is generally applied to podiform deposits, underground mining is applied to stratiform deposits.
What is the chromite mineral group?
Chromite, a brownish black cubic mineral belonging to the spinel group, is the only ore mineral from which metallic chromium and chromium compounds are obtained.
What does a mineral with earthy luster look like?
This azurite mineral has a granular texture with a freshly broken appearance; therefore, it displays an earthy luster. In some cases, earthy minerals look like dirt or dried mud, while others may be rough and porous in texture. Earthy luster may also look like unglazed pottery.
Where are the chrome mines in South Africa?
Western Chrome Mines (WCM) WCM is situated approximately 130km north-west of Johannesburg, close to the town of Mooinooi in the North West Province, and comprises of three underground mines, two surface beneficiation plants and two tailings re-treatment plants.
What kind of minerals have adamantine luster?
Due to their brilliant appearance and high degree of quality, they are commonly known for displaying adamantine luster. As the name implies, waxy minerals have a luster resembling the surface of a wax candle or beeswax. Examples include jade, carnelian, chalcedony (left photo), opal and turquoise.
Where does the word lustre come from in mineralogy?
Lustre or luster is the way light interacts with the surface of a crystal, rock, or mineral. The word traces its origins back to the latin lux, meaning light, and generally implies radiance, gloss, or brilliance. A range of terms are used to describe lustre, such as earthy, metallic, greasy, and silky.