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During the last 20 years, Australia has assumed a major role in the production of blue sapphire. Most of the gem material comes from alluvial deposits in the Anakie (central Queensland) and New ...

The geology and occurrence of the sapphires appears to be similar to that of the gem corundum from Australia, Thailand, and Kampuchea (Cambodia). For the most part, the rough sapphires are greenish ...

If you have the Chase Freedom Unlimited but are desperate for the Sapphire Preferred and fall under this rule, you could talk to a Chase agent to see if you're eligible to upgrade. Keep in mind you'll ...