$170Median
11Sold (12 mo)
$190Last sale
Borcarite specimens for sale
7 for sale · $155–$4,500 USD
43 in the gallery
Borcarite is a calcium-magnesium borate carbonate mineral that forms in carbonate-rich environments. It typically occurs as small, tabular or equant crystals with a vitreous to dull luster and a pale, often colorless to light-hued appearance. The mineral’s composition includes carbonate groups and borate units, contributing to its delicate optical qualities and light refractivity.
- Formula
- Ca4MgB4O6(CO3)2(OH)6
- Rarity
- Rare
- Stability
- Stable
- Collector interest
- Very High Interest
- Classification notes
- Borate-carbonate; hydrous calcium magnesium borate carbonate
Key characteristics
- Crystal system
- monoclinic
- Mohs hardness
- 4
- Specific gravity
- 2.8
- Luster
- vitreous
- Transparency
- transparent, translucent
- Color
- colorless, white, gray
- Streak
- white
- Cleavage
- perfect
- Fracture
- uneven
- Crystal habit
- prismatic, tabular, granular, massive
Buy Borcarite specimens
View all 7Where Borcarite is found
Top localities
- Shijiangshan Mine2 specimens
About Borcarite
Notable specimens come from China and Mexico, where borcarite has been found in hydrothermal and carbonate-rich settings. Collectors value its rarity and its association with other borate minerals, as well as its crisp crystal forms and subtle coloration that can enhance mineral displays. While not widely represented in many collections, borcarite offers an intriguing example of complex borate carbonate chemistry and the mineral’s capacity to occur in accessible, visually appealing habits. Its scarcity makes clean, well-formed crystals particularly desirable for display and study.
