Willemita
Willemita is a mineral with formula Zn₂SiO₄, in the Silicatos (Nesosilicatos) group. This specimen comes from Mina Preguiça, Setúbal, Portugal.
Description
Small, fine, scattered crystals, with a prismatic or granular habit, intermixed in the brown matrix. More earthy and granular texture.
History of this specimen
Classic fluorescent mineral. The green fluorescence is observed under UV.
Technical data
- Catalogue No.
- 0573
- Composition
- Zn₂SiO₄
- Name
- Willemita
- Group
- Silicatos (Nesosilicatos)
- Mine
- Mina Preguiça
- Province
- Setúbal
- Country
- Portugal
- Size (cm)
- 6 x 4
- Etymology
- In honor of King William I (Willem I) of the Netherlands.
- Quality
- Buena
- Value trend
- Estable
Related specimens
- Autunita — Portugal
- Autunita — Portugal
- Autunita — Portugal
- Autunita (Verde) — Portugal
- Cianita — Brasil
- Cianita (Negra (Taramita)) — Brasil
- Clinocloro — Italia
- Cuarzo — Portugal