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Home Gemstones Spinel
12.72 ctw Black Spinel Gemstones, Spinel Gems in Round Rose-Cut Shape for Sale.
Photos are of Actual Products for Sale
12.72 ctw Black Spinel Stones, Natural Spinel in Round Rose-Cut Shape for Sale Spinel Gemstones in 12 mm (calibrated) Size for Sale, Spinel Stones in Black Color

12.72ct Natural Black Spinel, Round Cut, 11.89 mm

9.7 out of 10
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Product ID: 438380
Type: Spinel
Weight: 12.72 ct (total) 2 gems
avg. 6.36 ct
Size: 12 mm calibrated
Size: 11.9 mm
Exact Size: 11.89 x 4.58 mm
Diameter x Depth
Shape: Round Rose-Cut
Color: Black
Clarity: Opaque
Treatment: Untreated
Origin: Thailand
Content: 2 pcs
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Product Description

These are 12.72 carat natural black Spinel gems, 2 pcs in round shape with an exact size of 11.89 mm x 4.58 mm (avg.). These loose Spinel gemstones were mined in Thailand and their clarity is Opaque. No treatment has been applied on these natural Spinel stones

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Overall Rating -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Although the stones are smaller than I thought, I really don't think in millimeters, they are perfect. I plan to put one into a ring and the other into a necklace. Ordering was easy, contact kept me aware of how shipping was going, and delivery was sooner than expected. The quality of stones I have ordered in the past and this recent order is outstanding and stones I will be proud to wear.

Posted By Ktreva52 in June, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I've made several purchases over the last 8 years and I've never been less than happy with any of them.

Posted By Jess in July, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
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Overall Rating -> 10 star ratings

My experience was done with ease

Posted By Barb in October, 2025
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Overall Rating -> 10 star ratings

I enjoyed the enormous amount of knowledge on your site. It helped me choose the gems I purchased.

Posted By Merrigold in August, 2026
Source: Bizrate
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