It’s quite true that an overwhelming majority of commercial grade citrine is heated to either weak, watery, or garish, obviously unnatural colors. Darker colors of citrine are produced by heat treatment of amethyst and smoky quartz, and red undertones are usually – but not always – evidence of this treatment. Fine, natural citrine, however, is…
Red tourmaline is something special. Its rich purplish-red with a pink undertone glistens like raspberry sorbet on a candlelit table. The color is deep and passionate; it stirs the emotions. You’ve probably seen red tourmaline listed under the unofficial trade name of “rubellite.” The vast majority of red-hued tourmaline is either pink, or it has…
Since we’re in July, and I’ve been talking about rubies lately, I thought I’d cover a very important part of what makes ruby burn with such crimson glory: literally, what makes a ruby a ruby. There is some science involved; some parts of consumer education are more complex than others, but don’t be afraid. It’s…
Have you ever seen a gemstone change from one color to another right before your eyes? If not, you’re in for a treat when you see your first fine alexandrite. Raspberry red in tungsten light or firelight, teal green in direct sunlight or fluorescent light – fine alexandrite is the color-change gemstone against which all…
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