Gemmology
English | Български
Where am I? > Home > Repository > Andalusite


Gallery view selector

Colour selector
Simple colour schemeredorangey redreddish orangeorangeorangey yellowyellowgreenish yellowyellowish greenslightly yellowish greengreenvery slightly bluish greenbluish greenvery strongly bluish greengreen-blue or blue-greenvery strongly greenish bluevery slightly greenish bluebluevioletish bluebluish violetvioletbluish purplepurplereddish purplestrongly purplish redslightly purplish redcolourlessgreyblack
Andalusite — specimen 0034, photo © NMNHS
Andalusite — specimen 0034, photo © NMNHS

Andalusite — specimen 0034

Origin

South America
Brazil
Andalusite — specimen 0034, locality map
Data

Weight: 0.55 ct; size: 4.90 | 4.86 | 3.38 mm; shape: round; colour: medium dark reddish orange; strong; clarity: eye clean; cut: very good; treatment: none.
Notes

Very clean specimen; very good mixed style cut. Source: John Bradshaw, Coast to Coast Rare Stones International.

Other specimens
Andalusite — specimen 0033

More information from ‘Classification’

Andalusite

A result of contact metamorphism of argillaceous sediments, also in regionally metamorphosed schists. Rare in granites and pegmatites (Anthony et al., 2001—2005).


Gemmology — gemstones
Front page | Introduction | Classification | Repository | Library

© 2024 National Museum of Natural History, Sofia (NMNHS)
Use of this website assumes acceptance of our terms of use.

The specimens illustrated in this site do not exist in the collections of the National Museum of Natural History, Sofia.