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Home Gemstones Star Sapphire
4.05 ct Black Star Sapphire Gemstone, Star Sapphire Gem in Oval Cabochon Shape for Sale.
Photos are of Actual Product for Sale
4.05 ct Black Star Sapphire Stone, Natural Star Sapphire in Oval Cabochon Shape for Sale Star Sapphire Gemstone in 9.6 x 7.1 mm Size for Sale, Star Sapphire Stone in Black Color

4.05ct Natural Black Star Sapphire, Oval Cut, 9.6x7.1 mm

9.7 out of 10
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Product ID: 683378
Type: Star Sapphire
Weight: 4.05 ct 1 gem
Size: mm calibrated
Size: 9.6 x 7.1 x 5 mm
Exact Size: 9.59 x 7.10 x 4.96 mm
Length x Width x Depth
Shape: Oval Cabochon
Color: Black
Clarity: Opaque
Treatment: Heated
Origin: Thailand / Kanchanaburi
Content: 1 pc
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Product Description

This is a 4.05 carat natural black Star Sapphire gem, 1 pc in oval shape with an exact size of 9.59 x 7.10 x 4.96 mm. This loose Star Sapphire gemstone was mined in Thailand and its clarity is Opaque. This natural Star Sapphire has been heated to enhance its vivid color.

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Overall Rating -> 10 star ratings

Very good

Posted By Niska in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
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Overall Rating -> 10 star ratings

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
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Overall Rating -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 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
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