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

Oval mixed-cut red gemstone photographed face-up against a pale gray background at Sapphire Row, showing a vivid slightly purplish red with bright crown facets and a deeper crimson core Garnets
Sapphire Row

Red Gemstones: A Gemologist’s Guide to Choosing the Right Red

Ruby, red spinel, garnet and rubellite all read as red — but they behave very differently in color, durability and...

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Emerald-cut vivid slightly bluish green Zambian emerald held in warm gold-toned tweezers at Sapphire Row, showing whitish jardin veils and mossy internal texture across the table Colored Gemstones
Sapphire Row

Gemstone Origin: Why Where a Stone Was Mined Changes Its Value

Origin is the one value factor you cannot see in a stone. Here is how Burma, Mozambique, Kashmir, Colombia and...

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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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A fine natural ruby from Sapphire Row, illustrating the color and quality that define expert ruby sourcing. Burmese Rubies
Gil Golan

Ruby Sourcing: Everything You Need to Know

This guide explores the enduring allure and investment value of the ruby, historically revered as the "king of gemstones" for...

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