Posts by G S SACHIN
Rose Gold Turning Coppery? What Your Skin pH Is Telling You
If your rose gold jewelry suddenly looks more copper than pink, your skin (and the metal alloy) is trying to tell you something. Rose g...
Nickel Allergies in the US: Is Palladium White Gold Worth the Premium?
Nickel allergy is the most common metal contact allergy in the U.S. Many people who react to costume jewelry also react to white gold t...
Why White Gold Yellows—And the 20-Minute Fix US Jewelers Use
White gold starts out bright white only because jewelers coat it with a thin layer of rhodium. Under that coating the metal is still go...
14K vs 18K: The Scratch Test You’ll Wish You Tried Before Buying
If you’re deciding between 14K and 18K gold, scratch resistance matters. It affects how a ring wears, how often a band needs polishing,...
Spinel’s Secret: Why It Faces Up Bigger Than Sapphire at the Same Carat
Spinel often looks bigger than a sapphire even when both weigh the same in carats. That surprise comes down to physics and cutting choi...
Ruby Glass-Fill: Why It Looks Perfect—Until It Doesn’t (Microscope Photos)
Glass-filled rubies look spectacular at first. The fractures are gone. The color deepens. For a modest price you can have a clear, brig...
Arizona Peridot, Maine Tourmaline, Montana Sapphire: Does “Made in USA” Matter?
Gemstones from the United States — Arizona peridot, Maine tourmaline, Montana sapphire — carry a clear story: they were found in Americ...
Paraíba vs “Paraíba-Like”: How US Sellers Stretch a Blue
Paraíba tourmaline is one of the most talked-about gems in the market. Its neon blue-to-green color is striking and rare. But over the ...
Unheated Sapphire or Just Good Lighting? Three Checks You Can Do at Home
Buying a sapphire advertised as “unheated” is common. Unheated stones usually command higher prices because their color formed naturall...
Can Jewelers Spot Moissanite Instantly? Bench Tests from Five US Cities
Moissanite looks a lot like diamond to the naked eye. It sparkles more, but spark alone is not proof. Jewelers in the U.S. routinely en...
