Analcima
Analcima is a mineral with formula NaAlSi₂O₆·H₂O, in the Zeolitas group. This specimen comes from Little Plains Quarry, Weldborough, Tasmania, Australia and joined the Terrium collection in 2002.
Description
Small, lustrous white crystals line several rounded cavities in dark grey volcanic matrix, with pores and fluid forms. The aesthetic is soft and discreet, with a strong geological identity.
About Analcima
Analcime is a tectosilicate of the zeolite group. It forms lustrous pseudo-isometric crystals, common in volcanic environments.
About the locality
Weldborough, Tasmania, is a classic area for analcime associated with basalts. Specimens show lined cavities and good crystallisation in geodes.
Technical data
- Catalogue No.
- 0463
- Internal reference
- T0070
- Composition
- NaAlSi₂O₆·H₂O
- Name
- Analcima
- Group
- Zeolitas
- Category
- Cavella
- Matrix
- Matriz basáltica porosa
- Mine
- Little Plains Quarry
- District / Municipality
- Weldborough
- Province
- Tasmania
- Country
- Australia
- Size (cm)
- 6 x 4.5 x 3
- Weight
- 74.5 g
- Acquired
- 2002
- Ex-collection
- Aleydis Soliveres
- Etymology
- From the Greek "aná" (weak) and "alké" (effervescence), for its weak reaction on heating.
- Quality
- Buena
- Value trend
- Estable