How Faceting Reveals Whether a Gem Is Precious or Semi-Precious
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How Faceting Reveals Whether a Gem Is Precious or Semi-Precious
Have you ever wondered why some gemstones flash with dazzling brilliance while others glow softly with color? The way a gem is faceted—how its surfaces are cut and angled—can actually help you tell whether you’re looking at a precious or semi-precious stone.
The Sharp Geometry of Precious Stones
Rubies and sapphires, both forms of corundum, are prized for their fiery sparkle and rich hues. Because they are extremely hard and have a high refractive index, gem cutters can give them precise, sharp-edged facets that bounce light internally like tiny mirrors. These tight facet junctions and balanced angles make the gem “come alive” with flashes of light even in dim conditions.
If you notice clean, crisp reflections and a symmetrical, mirror-like pattern, you’re likely holding a precious stone.
The Softer Glow of Semi-Precious Stones
Semi-precious gems such as amethyst, garnet, or peridot are often cut with broader, simpler facets or even smooth cabochon domes. Their lower hardness and refractive index mean they don’t return as much brilliance, so cutters focus instead on showing off color, size, or interesting inclusions. You might see larger facets, slightly rounded junctions, and a more subtle play of light—traits that signal a semi-precious gemstone.
Why It Matters
Understanding these differences not only deepens your appreciation for fine jewelry but also helps you make smarter buying decisions. When you can recognize quality faceting, you can more easily distinguish craftsmanship, authenticity, and value—whether shopping for a sparkling sapphire pendant or a glowing citrine ring.
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Discover the Difference for Yourself
At Tanean Bijl Jewelry, we curate both precious and semi-precious pieces that highlight the natural beauty of each stone. Explore our collection today to see how expert cutting brings every gem to life—facet by facet.
Visit: taneanbijl-jewelry.com