|Moonstone v. Opalite|
It's really pretty easy to tell if something is Opalite---which is just glass, and not a gemstone---or if it's Moonstone. And lately, sellers are really pushing this glass Opalite as "Opalite Quartz" claiming it's a natural stone! It is NOT, it is still just glass, no matter how many times deceitful sellers say it.
Opalite is often carved into figures, like talismans or Buddhas and skulls, etc., and lately carved or molded into crystal "point" shapes, and is sold as strands of beads or briolettes.
It is also carved into faceted briolettes, smooth cabochons, smooth circles, hearts, ovals, rounds, squares, and other gemstone-like cuts that are sold as jewelry items.
HOW TO TELL IF IT'S OPALITE
In other words, the "glow" of Opalite glass changes when viewed against light or dark backgrounds.
Also, Opalite glass is VERY inexpensive, and can be found in hobby stores like Michaels (marked "Opalite Glass") for about $5 for an entire strand of beads.
|Moonstone against light background|
|Moonstone against dark background|
Moonstone is made of two minerals---orthoclase and albite---which form in stacked layers within the stone. When light shines on this gemstone, the thin, flat layers scatter the light in a unique way, causing a phenomenon called "adularescence". Adularescence is the shimmering glow that moves across the gem, like a ghostly and ever-changing glow, as you move the gemstone. Moonstone has this shimmering blue glow, whether it is against a white background, dark background, or none at all! The glow follows the light in bright flashes.
Rainbow Moonstone is actually not moonstone, but is a variety of Labradorite. It also has adularescence in a variety of colors---blues, pinks, yellows, purples, greens, reds----hence the name.
|Faceted Rainbow Moonstone|
HOW TO TELL IF IT IS MOONSTONE
Just by looking at the Moonstone, most of the time, you can see these "layers" within the stone. The Moonstone will have "inclusions" or "cracks" and other features within the stone, and won't be perfectly clear like glass. There are some VERY high-end Moonstones that look nearly clear, but even these will not have that milky glass appearance like Opalite.
Rainbow Moonstones also have these "layers" within the gem, as does labradorite.
WHEN IN DOUBT...
You could always just ask the seller if they are selling genuine Moonstone, or Opalite! Any honest seller will tell you the truth. Or if you still have doubts, just ask me and I'll be glad to take a look and see if I can tell.