   Opal Photos
Cochise College
Photos of Gemstones
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Virtual Geology Museum
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Geology Home Page
Roger Weller, geology instructor

Opals
last edited: 1/29/08 number of photos: 39
Opal is SiO₂.nH₂O
hardness: 5.5 to 6
Also visit Cochise College Photos of Opals

lectures on opal
Opal- Cake M. Janssen

cabochons
Australian fire opal cabochons: A B C D
blue boulder opal from Australia: A

opal doublets: A B C
Mexican jelly opal cabochons: A B C D

Gilson synthetic opals: A

blue opals-Arizona: A

opals in jewelry

fire opal rings: A

fire opal pendants: A B C D
blue opal pendant: A

opal, uncut

Australian fire opal: A B C D E
polished Australian boulder opal: A

Mexican fire opal: A B C

Mexican jelly opal: A B C

dendritic opal from Brazil: A B

common opal, pink: A

common opal, red: A

common opal, dark red: A

blue opal from Arizona: A B

Photos are copyright free for non-commercial educational uses.
Just credit photos to R.Weller/Cochise College.
copyright 2008-R.Weller