Reviews & Guides

• Selecting an opal and knowing what you have!
• by tatadzik( 746)
• Opals have different refraction from different angles. The more refraction from different angles, the more colors, and the more refraction coverage over the stone, the more valuable the opal. Look for sellers... 

• Tags:

  opal | black opal | Australian opal | boulder opal | crystal opal

• 127 of 134 people found this guide helpful

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• Andamooka Black Opal Matrix "What is It?"
• by the_opal_miner( 366)
• "Andamooka Black Opal Matrix" a simple explaination: "Andamooka" is a opal mining town in the outback of South Australia, situated about 300 miles to the south and east of the more well known Coober Pedy. ... 

• Tags:

  andamooka black opal matrix | andamooka opal matrix | andamooka opal

• 73 of 73 people found this guide helpful

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• A guide to mexican opals
• by opalbuyer ( private )
• As a radiologist, writing a review on mexican opals was perhaps the last thing I expected to be doing, but having fallen in love with this most beautiful and diverse of gemstones, and given the paucity of... 

• Tags:

  opal | mexican | fire | cantera | australian

• 44 of 44 people found this guide helpful

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• Determining the value of opals - advanced topics
• by mbmiller( 462)
• This guide is a follow-up to my first guide on opal valuation. This guide will examine several of the more advanced topics in determining the value of cut opal. I have been cutting opal for about 20 years and... 

• Tags:

  opal | value | pattern | cut | buying

• 22 of 22 people found this guide helpful

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• Buying Rough Opal on eBay
• by mbmiller( 462)
• Buying rough opal is always a calculated gamble. The purpose of this guide is to give you some guidance and basic tools for buying rough opal. I have been buying rough opal for over 20 years. I have purchased... 

• Tags:

  opal | rough opal | black opal | white opal | opal cutting

• 14 of 14 people found this guide helpful

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