G S SACHIN The Karat Store US

01 Oct

Blog

Paraíba vs “Paraíba-Like”: How US Sellers Stretch a Blue

October 1, 2025
By G S SACHIN
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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 ...

30 Sep

Blog

Unheated Sapphire or Just Good Lighting? Three Checks You Can Do at Home

September 30, 2025
By G S SACHIN
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Buying a sapphire advertised as “unheated” is common. Unheated stones usually command higher prices because their color formed naturall...

30 Sep

Blog

Can Jewelers Spot Moissanite Instantly? Bench Tests from Five US Cities

September 30, 2025
By G S SACHIN
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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...

29 Sep

Blog

Moissanite vs Lab Diamond in Car Interiors: Which Looks Better in Shade?

September 29, 2025
By G S SACHIN
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Choosing between moissanite and a lab-grown diamond for decorative stones in a car interior is not just about price or ethics. The way ...

29 Sep

Blog

Why Thermal Testers Fail on Moissanite—and What US Jewelers Use Instead

September 29, 2025
By G S SACHIN
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Jewelers across the U.S. still rely on handheld thermal testers every day. But those same testers routinely mistake moissanite for diam...

28 Sep

Blog

DEF vs Near-Colorless Moissanite: Will Your Setting Make the Tint Obvious?

September 28, 2025
By G S SACHIN
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Choosing between a DEF (colorless) moissanite and a near-colorless moissanite comes down to how the gem will look once it’s mounted. Co...

28 Sep

Blog

Moissanite’s “Rainbow Fire”: Gorgeous in Sunlight, Overkill Indoors? A Week-Long Test

September 28, 2025
By G S SACHIN
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Moissanite is famous for its "rainbow fire" — bright, colorful flashes that can make a ring look alive in sunlight. But people who wear...

27 Sep

Blog

Insurance for Lab-Grown in the US: Why Some Policies Cost Less (and When They Don’t)

September 27, 2025
By G S SACHIN
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Insurance for lab-grown diamonds and other lab-grown gemstones works the same way as insurance for natural stones in principle: you pay...

27 Sep

Blog

Lab-Grown Clarity Inflation? Comparing US Listings to What You See IRL

September 27, 2025
By G S SACHIN
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Lab-grown diamonds are now common in U.S. listings. They cost less than natural diamonds and offer larger-looking stones for the money....

26 Sep

Blog

Blue Nuance Panic: When a Lab-Grown Looks Cool Under Office LEDs

September 26, 2025
By G S SACHIN
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You’ve walked into the office under cool LED lights and your lab-grown diamond suddenly reads a faint, icy blue. It looks different fro...

Posts by G S SACHIN

Paraíba vs “Paraíba-Like”: How US Sellers Stretch a Blue

Unheated Sapphire or Just Good Lighting? Three Checks You Can Do at Home

Can Jewelers Spot Moissanite Instantly? Bench Tests from Five US Cities

Moissanite vs Lab Diamond in Car Interiors: Which Looks Better in Shade?

Why Thermal Testers Fail on Moissanite—and What US Jewelers Use Instead

DEF vs Near-Colorless Moissanite: Will Your Setting Make the Tint Obvious?

Moissanite’s “Rainbow Fire”: Gorgeous in Sunlight, Overkill Indoors? A Week-Long Test

Insurance for Lab-Grown in the US: Why Some Policies Cost Less (and When They Don’t)

Lab-Grown Clarity Inflation? Comparing US Listings to What You See IRL

Blue Nuance Panic: When a Lab-Grown Looks Cool Under Office LEDs

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