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Chatham round sapphires

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Chatham-Created Round Blue Sapphires

Chatham-created round blue sapphires are not fakes, they are REAL blue sapphires grown by the flux method in a laboratory. They grow in the natural crystal structure of mined sapphires, so they exhibit the same physical, optical and chemical properties as mined blue sapphires. 

Sapphires are doubly refractive and often exhibit pleochroism, the visible display of different body colors from different angles. Chatham lab grown blue sapphires often show blue and violet pleochroic colors. Our round Chatham gem quality blue sapphires come in three hues: light, medium and dark. Select the hue you love the most when ordering below.  If you have any questions at all, please don't hesitate to call our staff gemologist at: 970-535-4139.

Looking for a mounting for your Chatham blue sapphire? Choose from our gorgeous blue sapphire engagement rings here or enjoy perusing our customizable jewelry and engagement rings on our new Custom Jewelry site. Most of our mountings can be customized by metal type, diamond quality, center stone size, shape and type so you get exactly what you're looking for. Click Here to begin your journey of selecting the perfect mounting. Simply select your preferences, submit your quote and we'll contact you shortly to finalize the purchase.

Round Diamond Equivalent Chart
Pictures not actual size. Sapphire is denser than diamond, so it weighs more for the same physical size. Because carat is a measurement of weight, not size, it's important to order colored stones based on physical size rather than carat weight.

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3.0mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs .14-.17 Ct. (SKU: CH-LGQ300RDBS)3.0mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs .14-.17 Ct. (SKU: CH-LGQ300RDBS)
3.5mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs .20-.24 Ct. (SKU: CH-LGQ350RDBS)3.5mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs .20-.24 Ct. (SKU: CH-LGQ350RDBS)
4.0mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs .31-.37 Ct. (SKU: CH-LGQ400RDBS)4.0mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs .31-.37 Ct. (SKU: CH-LGQ400RDBS)
4.5mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs .41-.50 Ct. (SKU: CH-LGQ450RDBS)4.5mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs .41-.50 Ct. (SKU: CH-LGQ450RDBS)
5.0mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs .59-.73 Ct. (SKU: CH-LGQ500RDBS)5.0mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs .59-.73 Ct. (SKU: CH-LGQ500RDBS)
5.5mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs .75-.91 Ct. (SKU: CH-LGQ550RDBS)5.5mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs .75-.91 Ct. (SKU: CH-LGQ550RDBS)
6.0mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs 1.05-1.25 Ct. (SKU: CH-LGQ600RDBS)6.0mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs 1.05-1.25 Ct. (SKU: CH-LGQ600RDBS)
6.5mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs 1.35-1.60 Ct. (SKU: CH-LGQ650RDBS)6.5mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs 1.35-1.60 Ct. (SKU: CH-LGQ650RDBS)
7.0mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs 1.65-1.97 Ct. (SKU: CH-LGQ700RDBS)7.0mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs 1.65-1.97 Ct. (SKU: CH-LGQ700RDBS)
7.5mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs 1.91-2.33 Ct. (SKU: CH-LGQ750RDBS)7.5mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs 1.91-2.33 Ct. (SKU: CH-LGQ750RDBS)
8.0mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs 2.50-3.00 Ct. (SKU: CH-LGQ800RDBS)8.0mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs 2.50-3.00 Ct. (SKU: CH-LGQ800RDBS)
8.5mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs 3.65-4.15 (SKU: CH-LGQ850RDBS)8.5mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs 3.65-4.15 (SKU: CH-LGQ850RDBS)
9.0mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs 4.00-4.52 (SKU: CH-LGQ900RDBS)9.0mm Round Gem Quality Chatham Lab-Created Blue Sapphire Weighs 4.00-4.52 (SKU: CH-LGQ900RDBS)


Click on your favorite Chatham-created gemstone below for more information, availability and loose stone prices:

Available Chatham Gemstone Shapes

Diamond Engagement Rings / Gemstone Engagement Rings & Bridal Sets / White Sapphire Engagement Rings / Sapphire Wedding & Engagement Rings / Moissanite Engagement Rings / His & Hers Birthstone Engagement Rings / Semi-Mount Engagement Rings / Create Your Own Ring / Wedding & Anniversary Bands / Lab-Grown Diamonds / Chatham-Created Gemstones / Loose Natural StonesGemstone & Diamond Education

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