Guide
Euclase specimens for sale
22 for sale · $150–$6,000 USD
161 in the gallery
Euclase is a mineral species that forms clear to pale green to colorless prismatic crystals with a vitreous to adamantine lustre. It typically occurs in low-temperature hydrothermal veins and pegmatites, often associated with beryl and quartz, and it can appear in short, tabular to elongated crystal habits. Crystals are commonly small to medium in size, displaying sharp terminations and well-developed faces that catch the light beautifully when polished or displayed in hand specimens.
- Formula
- BeAl(SiO4)(OH)
- Rarity
- Uncommon
- Stability
- Moderately Stable
- Collector interest
- High Interest
- Classification notes
- Sorosilicate; euclase group
Key characteristics
- Crystal system
- monoclinic
- Mohs hardness
- 7.5
- Specific gravity
- 3–3.1
- Luster
- vitreous
- Transparency
- transparent, translucent
- Color
- colorless, white, yellow, green, blue
- Streak
- white
- Cleavage
- perfect
- Fracture
- conchoidal, uneven
- Crystal habit
- prismatic, tabular, granular, massive
- Gem mineral
- Classic / historic
Buy Euclase specimens
View all 22Where Euclase is found
Top localities
- Equador20 specimens
- Ouro Preto13 specimens
- Minas Gerais11 specimens
- Gachalá10 specimens
- Chiá mine5 specimens
- Bahia4 specimens
- La Marina Mine3 specimens
- Brazil2 specimens
- Brumado2 specimens
- Yaogangxian Mine2 specimens
Guides
All guidesAbout Euclase
Notable localities include Brazil, Zimbabwe, and Colombia, where Euclase crystals are sought after for their transparency and vivid green hues, sometimes with a slightly bluish tint. The mineral also occurs in other areas, reflecting its formation under specific geological conditions that concentrate beryllium and aluminum silicate along hydrothermal pathways. Collectors value Euclase for its clarity, color, and optical quality, as well as its association with rare neighboring minerals, which adds context to a specimen’s origin and geologic story.
