This page gathers the stones in our collection that are accompanied by a report from AGL — the American Gemological Laboratories, an independent coloured-stone laboratory. AGL reports are valued for their detail on identification, geographic origin where it can be determined, and the disclosure of any treatment, which is why they are frequently requested for stones where provenance and clarity of disclosure carry real weight.
Two varieties appear here: Mozambique Ruby and Paraiba Tourmaline. Both are gems where a laboratory opinion genuinely informs the decision. Ruby is corundum coloured by chromium, and its market distinguishes carefully between stones that have been heated and those that have not. Paraiba tourmaline is a copper-bearing elbaite whose characteristic neon blue to blue-green tone derives from that copper content — something confirmed by analysis rather than by eye alone.
When choosing between them, weigh what the report actually tells you against what you want from the stone. Consider the strength and evenness of colour, how clarity reads at the size you are buying, and whether any treatment has been noted. A report supports the eye; it does not replace it, so judge the gem itself alongside its documentation.
