Round brilliant-cut amethyst in a vivid reddish purple with violet-purple flashes around the crown, photographed face-up on a pale gray background at Sapphire Row
Amethyst
Sapphire Row

Purple Gemstones: A Gemologist's Guide to Choosing the Right Purple

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Gemstone knowledge from the source — sourcing insights, care guides, and buying advice to help you choose stones and jewelry with confidence.

Gemstone Journal

A hand holding an open black gem box of loose pastel pink faceted gemstones, including a square step cut, a large pear and four ovals, with trays of loose colored gemstones behind at Sapphire Row August Birthstone
Sapphire Row

August Birthstone Guide: Peridot, Spinel and Sardonyx

August is the rare month with three birthstones: peridot, spinel and sardonyx. A gemologist's guide to what makes each one...

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Hand holding a gem box of matched pastel pink oval and round brilliant-cut gemstones at Sapphire Row, an example of the natural colored gemstones discussed in this lab-grown vs natural guide Colored Gemstones
Sapphire Row

Lab-Grown vs. Natural Colored Gemstones: Value, Beauty, and Authenticity

Lab-grown and natural colored gemstones can look identical — but they differ profoundly in origin, rarity, and long-term value. Here...

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Line bracelet of mixed fancy-cut white gemstones in yellow gold worn on the wrist, photographed at Sapphire Row Cultured Pearls
Sapphire Row

Identifying a Real Pearl: How to Tell Authentic Pearls from Imitations

Luster, the tooth test, drill-hole checks, and lab verification — an expert guide to telling real pearls from imitations, and...

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A collector examines a gem box of pastel pink oval and round-cut gemstones at Sapphire Row, the kind of matched parcel prized by colored gemstone collectors Alexandrites
Sapphire Row

Rare by Nature: Why Colored Gemstones Are Emerging as High-Value Collector Investments

Collectors are turning to rare colored gemstones — spinel, alexandrite, and tourmaline among them. Here is how rarity, untreated color,...

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Fine natural rubies from Sapphire Row, including vivid pigeon blood red investment-grade loose gemstones Burmese Rubies
Sapphire Row

The Investment Case for Rare Rubies: Color, Clarity, and Provenance

Fine rubies are among the few luxuries that can hold and grow in value. Here is how color, clarity, carat...

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Vivid green oval-cut natural emerald held in jeweler's tweezers, an example of investment-grade color at Sapphire Row Colombian Emeralds
Sapphire Row

Emeralds as Investments: The Complete Guide to Value, Rarity, and Long-Term Growth

What makes an emerald investment-grade? A gemologist's guide to the quality factors, origins, treatments, and certification standards that drive emerald...

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