Carnelian specimens for sale
1 for sale · $35 USD
Carnelian is a reddish-orange variety of chalcedony valued for its warm color and smooth, waxy luster. It forms as microcrystalline quartz in volcanic environments, commonly filling cavities in basalt and other lava flows where silica-rich fluids crystallize. The resulting stones are typically translucent to semi-opaque, with a uniform to banded color that deepens toward the core in some specimens.
- Formula
- SiO2
- Rarity
- Common
- Stability
- Stable
- Collector interest
- High Interest
- Classification notes
- Silicate minerals; framework silicates (tectosilicates); Quartz group (SiO2)
Key characteristics
- Crystal system
- trigonal
- Mohs hardness
- 6.5–7
- Specific gravity
- 2.58–2.64
- Luster
- vitreous, waxy, dull
- Transparency
- translucent
- Color
- red, orange, brown
- Streak
- white
- Cleavage
- none
- Fracture
- conchoidal, uneven
- Crystal habit
- botryoidal, stalactitic, granular, massive
- Gem mineral
- Classic / historic
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About Carnelian
Notable specimens come from classic localities such as Brazil, India, and parts of Africa, where long-standing mining and historical use have produced well-cut cabochons and beads. Collectors prize Carnelian for its rich tones ranging from brick-red to orange and for smooth, durable surfaces that take a high polish. The material’s classic appearance and wide historical use in engraved intaglios and beadwork add to its appeal as a versatile specimen for display and study.