What a gemmologist would tell you across a table: how each stone is graded, what it should cost, what the treatments mean, and where the trade names stop meaning anything.
One word can double the price of an orange garnet. No laboratory will back it up.
Tanzanite CareWarm soapy water and a soft brush. Never an ultrasonic cleaner. The rest is about where you wear it.
Tanzanite GemmologyHow the blue in a tanzanite comes about, and why it stays that way for good.
Tanzanite GradingThere is no official grade for tanzanite colour. Here is the vocabulary that does mean something.
Tanzanite MarketColour first, size second, everything else after. Where the money actually goes in a tanzanite quote.
Tanzanite Buying guideThey can look identical across a table. Under a loupe, and on the wrist, they behave nothing alike.