To determine whether or not turquoise is authentic, check for uniform color throughout the piece, opaqueness and low shine. Fake turquoise is often made from pale stones injected with dye, which appear overly shiny, clear and streaked, according to BJBead.com.Know More
Another means of determining whether or not a stone is turquoise is to hold a hot pin to it. If the stone begins to melt or produces an artificial odor, it is likely plastic or covered in epoxy. In fact, a hot needle often penetrates the epoxy coating. Before purchasing purportedly turquoise pieces from jewelers and other sellers, check to see if they are reputable by researching them online. BJBead.com suggests asking for written documentation of the stone's authenticity before buying.
Turquoise Sky reports that fake turquoise pieces are often sold at lower prices than legitimate stones and cautions against buying turquoise at suspiciously steep discounts. These impostor stones are often made of epoxy and powdered turquoise placed around a rock base. Another trick used by fake turquoise producers is to cover a rock with dyed magnesite and howlite, which is known as buffalo turquoise. To find out for certain if a purchased piece is fake, send it to a professional lab for verification and ask for a written report.Learn more about Precious Metals & Gems
When holding genuine crystal glass up to the light, a rainbow should be seen because crystal glass acts as a prism. If a rainbow cannot be seen, it is plain glass. Crystal produces a musical ring when it is struck, and glass does not.Full Answer >
Turquoise prices per ounce vary based on availability, carat, quality, grade and rarity. One carat of turquoise is equal to .007 ounces and is priced by grade and carat.Full Answer >
Determine the authenticity and value of pearls by conducting the tooth test and inspecting the color, surface thickness, luster, shape and size of the pearl as well as any blemishes. This process does not require any specialized equipment.Full Answer >
It is possible to determine whether or not a necklace is real coral by dabbing it in an inconspicuous area with a cotton swab dipped in a bit of lemon juice. If it is real, small bubbles form on the surface of the coral.Full Answer >