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


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
Pleonaste — specimen 0385, photo © NMNHS
Pleonaste — specimen 0385, photo © NMNHS

Pleonaste — specimen 0385

Origin

East Asia
China
Pleonaste — specimen 0385, locality map
Data

Weight: 0.14 ct; size: 2.97 | 2.96 | 2.08 mm; shape: round; colour: black; clarity: opaque; cut: good; treatment: none.
Notes

Small opaque specimen; good brilliant style cut. Source: David Weinberg, Multicolour Gems Ltd.

Other specimens
Pleonaste — specimen 0384Pleonaste — specimen 0463Pleonaste — specimen 0442Pleonaste — specimen 0648Pleonaste — specimen 0650Pleonaste — specimen 0666Pleonaste — specimen 0670Pleonaste — specimen 0665Pleonaste — specimen 0671Pleonaste — specimen 0672Pleonaste — specimen 0673

More information from ‘Classification’

Pleonaste

An intermediate variety of the hercynite-spinel series, iron-rich spinel or magnesium-rich hercynite. Often called black spinel.


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.