عقیق احمر
From Wikipedia, the free encyclopedia
From Wikipedia, the free encyclopedia
| عقیق احمر | |
|---|---|
.jpg) Polished carnelian/sard pebbles. Scale is in millimeters. | |
| General | |
| Category | Chalcedony variety |
| Formula (repeating unit) | Silica (silicon dioxide, SiO2) |
| Crystal system | Trigonal |
| Identification | |
| Formula mass | 60 g / mol |
| Color | Reddish-brown |
| Cleavage | Absent |
| Fracture | Uneven, splintery, conchoidal |
| Mohs scale hardness | 6 - 7 |
| Luster | Vitreous, dull, greasy, silky |
| Streak | White |
| Diaphaneity | Translucent |
| Specific gravity | 2.59 - 2.61 |
| References | [1] |
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.
