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0.66 ct Blue Sapphire Gemstone, Sapphire Gem in Diamond-Cut Shape for Sale.
Photos are of Actual Product for Sale
0.66 ct Blue Sapphire Stone, Natural Sapphire in Diamond-Cut Shape for Sale Sapphire Gemstone in 5 mm (calibrated) Size for Sale, Sapphire Stone in Twilight Blue Color

0.66ct Natural Twilight Blue Sapphire, Round Cut, 5.14 mm

9.8 out of 10
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Sapphire Product ID: 467399
Type: Sapphire
Sapphire Weight: 0.66 ct Sapphire 1 gem
Sapphire Size: 5 mm calibrated Sapphire
Sapphire Size: 5.1 mm Sapphire
Sapphire Exact Size: 5.14 x 3.46 mm
Diameter x Depth
Sapphire Shape: Diamond-Cut Sapphire
Sapphire Color: Twilight Blue Sapphire
Sapphire Clarity: VVS Sapphire
Sapphire Treatment: Heated
Sapphire Origin: Madagascar Sapphire
Content: 1 pc
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Product Description

This is a 0.66 carat natural twilight blue Sapphire gem, 1 pc in round shape with an exact size of 5.14 mm x 3.46 mm . This loose Sapphire gemstone was mined in Madagascar and its clarity is VVS (Eye Clean). This natural Sapphire has been heated to enhance its vivid color.

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GemSelect Certified Store Reviews

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Overall Rating -> 10 star ratings

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.

Posted By G.W. in June, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
Source: Bizrate
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