Opal can look like magic. Flashes of color jump as you tilt the stone. But not all opal forms in nature. One of the most reliable clues that an opal was grown in a lab is the so‑called “lizard skin” pattern. It is a surface mosaic made of repeating, neatly edged patches. That mosaic sits […]
Cat’s eye alexandrite sits in the “almost mythical” tier of gemstones. It combines two rare effects—color change and chatoyancy—inside the same crystal. That rarity has sparked a wave of imitations and lab-grown substitutes. If you collect or buy jewelry, you need to know how to tell a true natural cat’s eye alexandrite from the growing
Alexandrite’s color-change is magic. Under daylight it looks green; under warm light it turns red. Natural stones do this because of chromium in chrysoberyl’s crystal lattice. Today, labs can reproduce that with high precision using the Czochralski, or “pulled,” growth method. If you know how the process works, you can recognize its fingerprints under the
Alexandrite is famous for a dramatic color change. In daylight, it looks green. Under warm, incandescent light, it turns red. That “green to red” shift is the hallmark of the real thing. Yet many stones sold as “alexandrite” flip green to purple instead. That purple shift is a key warning sign of a common lab-grown
Natural alexandrite is one of the rarest gemstones on earth. Fine stones can sell for $10,000–$30,000 per carat, and exceptional pieces go far higher. So when someone pays $500 for a “1-carat alexandrite” with a bold green-to-red color change, there’s only one likely reason: it isn’t natural. It’s either lab-grown alexandrite or a different gem
Jewelers love the phrase “lab-grown alexandrite.” It sounds exotic and rare, and it hints at the famous green-to-red color change that collectors chase. Here’s the truth: in today’s market, most stones sold as “lab-grown alexandrite” are not alexandrite at all. They’re lab-grown color-change sapphire. The color change may look similar, but the chemistry, structure, value,
Real Kashmir sapphires are rare. Their price invites fakes, upgrades, and wishful thinking. Lately, I keep seeing “Kashmir sapphires” that look glassy—clean, sharp, and a little too bright—sold as “velvety” Kashmir. That word matters. True Kashmir stones have a soft, even glow you can see and prove with a loupe. If you remember one thing,
Padparadscha sapphires sit at the knife edge of color: a delicate mix of pink and orange that looks like a tropical sunset. That balance is rare in nature—and easy to mimic in a lab or with aggressive treatments. Today, lab-grown “padparadscha” is common and cheap, while natural stones with true pad color remain scarce and
Shopping for a sapphire can feel like learning a new language. Sellers throw around terms like “heated,” “unheated,” and “lab” as if everyone knows what they mean. The differences matter because they change price, rarity, and long-term value. Here’s a clear, practical guide to help you buy with confidence—and why an unheated natural sapphire can
Sapphires are among the most faked gems in jewelry. The most common impostor is a lab-grown sapphire made by the flame fusion (Verneuil) method. It is real corundum chemically, but not natural. The single most reliable visual clue is curved striae—fine, sweeping internal growth lines that arc like ripples. When you know how to look,
