Sapphire vs Spinel: What’s the Real Difference Between These Gemstones?
When choosing gemstones, it’s important to understand the nuances between similar-looking stones.
In short: Sapphire (corundum, Mohs 9, double refraction) is harder and more valuable than spinel (Mohs 8, single refraction), though both can look similar. Top Kashmir sapphire exceeds $50,000 per carat; top Burmese red spinel reaches $8,000. Spinel is rarely treated; sapphire is usually heat-treated. Choose sapphire for resale and tradition; spinel for natural, untreated character at lower cost.
Sapphire and spinel are two such gems that, while they may look alike at first glance, have distinct characteristics.
This guide explores the differences between sapphire and spinel to help you make an informed decision when shopping for jewelry.
Sapphire and Spinel: A Brief Overview
Sapphires have long been treasured for their deep blue hues and outstanding durability.
Made from corundum (aluminum oxide), sapphires rank 9 on the Mohs hardness scale, second only to diamonds.
This makes them an excellent choice for daily wear, especially in engagement rings and family heirlooms.
Spinel, on the other hand, has often been mistaken for sapphire due to its similar appearance.
It’s made of magnesium aluminum oxide and comes in a range of colors, including red, pink, purple, and blue.
With a hardness of 7.5 to 8, spinel is durable, though slightly softer than sapphire.
If you're drawn to bold and colorful jewelry, check out gemstone engagement rings to explore a range of styles and stones.
