Realgar (/ r i ˈ æ l ɡ ɑːr,-ɡ ər / ree-AL-gar, -⁠gər), also known as arsenic blende, ruby sulphur or ruby of arsenic, is an arsenic sulfide mineral with the chemical formula α-As 4 S 4. It is a soft, sectile mineral occurring in monoclinic crystals, or in granular, compact, or powdery form, often in association with the related ...

2023年9月5日 · Realgar, also known as “ruby sulfur” or “arsenic sulfide,” is a naturally occurring mineral composed of arsenic and sulfur with the chemical formula As₄S₄. It is classified as an arsenic sulfide mineral and is typically found in association with other minerals in hydrothermal veins and volcanic deposits .

realgar, an important ore of arsenic, a red or orange mineral containing both arsenic and sulfur. Typically it is a minor constituent of ore veins in association with orpiment (into which it disintegrates on long exposure to light).

What is Realgar? Realgar is a monoclinic arsenic sulfide mineral with a brilliant red color and a chemical composition of As 4 S 4. Well-formed realgar crystals can look so much like red gemstones that the mineral was often called "ruby sulfur" and "ruby arsenic."

Realgar is an historically important mineral, with a striking ruby-red color that stands out in the mineral kingdom. The rare transparent lustrous forms are truly masterpieces in mineral aesthetics. Realgar is a photosensitive mineral and will alter to Pararealgar upon prolonged exposure to light.

An old realgar locality on the Balkan Peninsula is found at Allchar, Republic of Macedonia. Alters to pararealgar on exposure to light. Visually similar to sarabauite and other red arsenic-sulphur minerals.

2023年4月10日 · Discover the dangerous allure of realgar, the ruby-red rebel of the sulfides. Learn about its properties, uses, value, & more in our Realgar Gemstone Guide!

Washington Minerals is an educational resource providing information about Washington state's mineral occurrences and their associated geology. Webauthor: Jeffrey M. Schwartz.

Realgar gems belong to the arsenic sulfide mineral group and possess a vivid red-to-orange-red color. They have a translucent to opaque appearance, and their luster can range from resinous to sub-metallic.

2023年12月10日 · Realgar Properties. Realgar, also referred to as Ruby Sulphur, is an arsenic sulfide mineral found in volcanic hot springs and low-temperature hydrothermal veins. This transparent crystal exhibits a resinous and greasy luster, commonly appearing in dark red, orange, or red hues.