Sulfides: Proustite
Diagnostic Card.
Ag 3 As S 3
Crystal system trigonal
2.5 Hardness
Specific gravity 5.5
Cleavage is good
fracture conchoidal
Colour dark red
Color in light red powder
Shine on Diamond to semimetallic
Red silver ore (silver snag). The collective term that combines two related minerals: lighter - proustite Ag3AsS3 and dark - pyrargyrite Ag3SbS3. Diamond Gloss to metallovidnogo, transparent or translucent. Colours: red or lead-gray, in fragments of thin ruby red. The bar is bright red, purple-red. Fracture conchoidal, splintery, fragile. Cleavage is perfect. Formed in the lead-silver deposits. The crystals (trigonal system) prismatic, often twinned, there are also dense aggregates. Deposits: in Saxony (Germany), the Czech Republic, Spain, Canada, USA, Peru, Bolivia, Chile.
It forms dense masses or scattered nodules and veins, although there are rare and beautiful crystals, precious for collectors. They usually have a columnar habit, but their shape is determined by the presence of numerous faces of the rhombohedron and skalenoedra. The color of scarlet-red and carmine red and dark, with a tendency to the black. Transparent, with diamond-metallic luster. Initially, there was an opinion, if the mineral contains gold, and because of this it was called the red (or gold) ore.
Chemical composition. Silver (Ag) 65,4%, arsenic (As) 15,2%, sulfur (S) 19,4%. Sometimes there are some variations in the chemical composition. Transparency. Translucent red. Class symmetry. Ditrigonalno-pyramidal - Sm. Form crystalline precipitates. Dense drain weight, prismatic crystals, scalenohedral. Cleavage. Good for the (1011).
Diagnostic features.
In light silver patina appears with time. It is easy to melt. Behavior in acids. It dissolves in nitric acid.
Origin.
It is found in near-surface areas serebronosnyh veins with galena and sphalerite.
Place of Birth.
Very beautiful specimens (a few centimeters in size) were delivered from Chanyarsilo in Chile, as well as the Ore Mountains of Saxony and Bohemia, and from the Black Forest, OIE and Delfinato in France. In the US, found in many places in Colorado, Nevada, Arizona, Idaho. In Sardinia, discovered in a mine in the Sarrabus-skalenoedrah crystals with native silver, stefanitom, pyrargyrite, argentite, calcite.
- Gatchell - "New Almadén snag" - arsenide and antimony sulfide (modern sulphosalts)
- Antimony - toxic metal (semi-metal) are widely used in industry, medicine and engineering
- Zirconium - a rare and non- metal and dangerous jewel in the oxide and salts
- Gold - yellow dangerous and toxic metal -date and accurate digital cable technology
- Sulphur - a golden-yellow toxic substance and a sign of volcanic activity
- Cadmium - a toxic uncirculated unknown wide range of people silvery metal
- Lead - a poisonous gray simulator silver metal and toxic metal snag
- Arsenic - poison classic medieval and modern poisoners and medicine in medicine
Toxic and hazardous radioactive rocks and minerals
** - Poisonous stones and minerals (obligatory check in chemical laboratory + clear indication of toxicity)
** - Radioactive rocks and minerals (obligatory check on a regular dosimeter + ban on the open sale of radioactivity in the event of more than 24 mR / hour + additional measures to protect the population)
Catalog minerals and gems in groups of the world
** - Poisonous stones and minerals
** - Radioactive rocks and minerals
Comments
Commenting, keep in mind that the content and the tone of your messages can hurt the feelings of real people, show respect and tolerance to his interlocutors, even if you do not share their opinion, your behavior in terms of freedom of speech and anonymity offered by the Internet, is changing not only virtual, but real world. All comments are hidden from the index, spam control.