The 4C’s of Sapphires

Understanding Inclusions in Sapphires

Natural imperfections in sapphires—called inclusions—are completely normal. These tiny features form when minerals or other materials get trapped inside the stone as it grows deep within the earth.

While inclusions add to a sapphire’s unique character, fewer visible imperfections generally mean a higher value. That said, many inclusions are barely noticeable to the eye and don’t affect the beauty or durability of the stone—just part of the charm of something truly natural.

Common Sapphire Inclusions

Natural sapphires often have tiny imperfections formed during their growth. Common types include:

- Feathers- soft, wispy lines
- Cleavage- internal break lines
- Cavities- small surface openings or indentations
- Fingerprints– fluid-filled patterns resembling fingerprints
- Naturals- untouched parts of the original crystal left on the surface

These inclusions are a normal part of what makes each sapphire unique.

Carat

Carat is the unit of measurement used to weigh both diamonds and gemstones. One carat is equal to 200 milligrams or 0.20 grams. Gemstones are price per carat.

Sapphire Density

Sapphire gemstones are denser than diamonds, so the same weight may appear smaller. A 1 carat diamond will appear larger than a 1 carat sapphire because the sapphire material is denser.

Natural Sapphires

There are no treatments on this gemstone. Natural sapphires of fine colors are rare. They can demand a higher price per carat.

$$$ Highest Price Per Carat

Heated Sapphires

There is only heat treatment to enhance the natural color and brightness. This treatment is very stable and well accepted within the jewelry industry.

$$ Second Highest Price Per Carat