What is a sapphire?

1 min read
Quick answer: Sapphire is blue corundum (Mohs 9) – second hardest gemstone. Ideal for engagement rings; royal blue and pink are the most popular colors.

Sapphire is corundum (Al₂O₃) in any color except red – the blue color is caused by titanium and iron impurities. With a Mohs hardness of 9, it is the second hardest gemstone after diamond and ideal for daily wear as an engagement or everyday stone.

Sapphire Colors

  • Royal Blue: Deep, rich blue – the most expensive and sought-after color
  • Cornflower Blue: Medium, vibrant blue
  • Pink Sapphire: From delicate baby pink to intense magenta
  • Yellow Sapphire: Sunny and fresh
  • Padparadscha: Delicate orange-pink – extremely rare and expensive

Why Sapphire as an Engagement Stone?

Made famous worldwide by Princess Diana's 12-carat sapphire ring. A Mohs hardness of 9 makes it suitable for everyday wear like almost no other colored gemstone. In blue or pink, it will be the most popular diamond alternative for engagement rings in 2026.

Sapphire Jewelry: corelunejewellery.de.

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