Opal

 

Origin: Glenrowan, Victoria, Australia

Sample size: field of view 9 mm (top), field of view 2 mm (bottom)

Sample owner: Keith and Margaret Brown

 

Origin: Yowah, Quensland, Australia

Sample size:  unknown

Sample owner: Steve Sorrell

Photo courtesy of: 

 

 

Variety hyalite

Origin: Squaretop Mountain, Dalby (Kiamkillenbun ?), Queensland, Australia

Sample size: 20 mm tall (top), 25 mm tall (bottom)

Sample owner: Vic Cloete

 

Photo courtesy of: 

Vic Cloete 

 

  

Black opal

Origin: Lightning Ridge Field, Queensland, Australia

Sample size: 4 x 3 x 2.2 cm

 

  

Fire opal

Origin: Chihuahua, Mexico

Ex. Marty Zinn collection

Sample size: 6.3 x 5.9 x 3.3 cm

 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

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