Hemimorfita Azul
Hemimorfita is a mineral with formula Zn₄Si₂O₇(OH)₂·H₂O, in the Silicatos (Sorosilicatos) group. This specimen comes from Mina San Antonio, East Camp, Distrito Minero de Santa Eulalia, Aquiles Serdán, Chihuahua, México and joined the Terrium collection in 2025.
Description
Several complete fan-shaped globules, well defined and with no visible damage, of blue hemimorphite, protected within a broad cavity in limonitic matrix.
About Hemimorfita
Hemimorphite is a hydrated zinc silicate that crystallises in the orthorhombic system. It typically forms fans, rosettes and botryoidal aggregates. The bluish tones at Santa Eulalia derive from copper inclusions, valued for their rarity.
About the locality
The San Antonio Mine, within the East Camp of the Santa Eulalia mining district, is one of the classic world localities for hemimorphite. This district, active since the late 19th century, is noted for its zinc and lead mineralogy, producing hemimorphite specimens of very high quality and aesthetic character.
Technical data
- Catalogue No.
- 0140
- Composition
- Zn₄Si₂O₇(OH)₂·H₂O
- Name
- Hemimorfita
- Variety
- Azul
- Group
- Silicatos (Sorosilicatos)
- Category
- Cavella
- Matrix
- Matriz limonítica
- Mine
- Mina San Antonio, East Camp
- District / Municipality
- Distrito Minero de Santa Eulalia
- Province
- Aquiles Serdán
- Region
- Chihuahua
- Country
- México
- Size (cm)
- 6 x 3 x 3
- Weight
- 85 g
- Acquired
- 2025
- Etymology
- From the Greek "hemi" (half) and "morphé" (form), in allusion to its hemimorphic crystal structure.
- Quality
- Notable
- Value trend
- Estable