English | Български
Where am I? > Home > Repository > Chalcedony

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
Chalcedony — specimen 0205, photo © NMNHS
Chalcedony — specimen 0205, photo © NMNHS

Chalcedonyspecimen 0205


Bulgaria, Haskovo, Stambolovo, Rabovo, 41.60905°N 25.64801°E, 185 m
Chalcedony — specimen 0205, locality map

Weight: 9.41 ct; size: 12.98 | 12.20 | 9.56 mm; shape: octagon; colour: light grey; clarity: translucent; cut: excellent; treatment: none.

Clean specimen; excellent step cut style by Tan Pen.

Other specimens
Chalcedony — specimen 0088Chalcedony — specimen 0403Chalcedony — specimen 0180Chalcedony — specimen 0510Chalcedony — specimen 0511Chalcedony — specimen 0512Chalcedony — specimen 0580Chalcedony — specimen 0591Chalcedony — specimen 0225Chalcedony — specimen 0688Chalcedony — specimen 0418Chalcedony — specimen 0558Chalcedony — specimen 0179Chalcedony — specimen 0183Chalcedony — specimen 0404Chalcedony — specimen 0265Chalcedony — specimen 0348Chalcedony — specimen 0684

More information from ‘Classification’

Traditionally defined as a fibrous cryptocrystalline variety of quartz. More recently, it has been shown that much chalcedony is a mixture of quartz and mogánite. Pure chalcedony may contain trace amounts of silanol groups.