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18/18 quality

15.18 Carat round lab Diamond

RC Ideal cut
F color
SI1 clarity

Sorry, this diamond is no longer available

The status of this diamond is pending. You can reach out to our gemologists to help you find a similar diamond, or use the option below to search alternatives.

Learn About Your Diamond
18/18 quality

Cut:

8/8

You’ve selected a 15.18 carat Round lab diamond. 0% of our users choose round diamonds. Learn more about them here.

Cut is the most important factor. When an experienced gemologist picks up a diamond grading report, their eyes go to very specific values. They are looking to see if these fall within the desired ranges. Seemingly unimportant values like the depth percentage have a large effect on how your diamond will sparkle - and these values differ for each shape.

Follow the checklist prepared by our gemologists to see how your diamond fares. If it misses by a little bit on one or two, that’s fine, but we recommend trying to find a stone that passes on all:

Good
Very Good
Excellent
Your diamond
Rare Carat Ideal
PropertyTargetDiamond
Cut
Excellent
Ideal
Symmetry
Very Good or better
Excellent
Polish
Very Good or better
Excellent
Girdle Percentage
2.5% - 4%
2.5%
Girdle Thickness
Thin to Thick
Med.
Table
54% - 60%
57.0%
Depth
59% - 63%
60.8%
Crown Angle
33° - 35°
34.8°

Color:

3/3

Your 15.18 carat Round lab diamond is graded F color (Colorless), and you can read more about F color diamonds here.

Color is graded beginning with D (Colorless). Learn more about diamond color here. The market prices colorless diamonds higher as they are rarer, but some people prefer warmer colored stones.

Our gemologists check for following color issues before recommending a diamond:

(K-Z)
(G-J)
Your diamond
(D-F)
PropertyTargetDiamond
Color
K-D
F
Artificial Treatment
No
No
Fluorescence Color
None or Blue
None
Fluorescence Strength
Faint or less
None

Clarity:

7/7

Your 15.18 carat Round lab diamond is graded SI1 clarity, which stands for Slightly Included 1. Read more about SI1 clarity diamonds here, or learn more about diamond clarity in general here.

There are minimum clarities our gemologists prefer for each shape, but beyond that clarity is a matter of budget and preference. People typically aim for an eye clean stone. Also, our gemologists have certain deal-breakers when it comes to clarity. For example, our gemologists always avoid stones with a cavity, because with one wrong hit your diamond can crack.

Use the checklist below to ensure your diamond passes. Consult us before purchasing to see if any other nuanced issues are present:

Your diamond
SI2-SI1
VS2-VS1
VVS2-VVS1
IF-FL
Slightly Included 1:
Visible under 10x magnification, and may be visible to the naked eye. Get an expert opinion
PropertyTargetDiamond
Clarity
SI2 or above
SI1
Cavity
No
No
Chip
No
No
Knot
No
No
Laser Hole
No
No
Etch Channel
No
No
Patch
No
No

Diamond Size: 15.18 Carat

A diamond's carat weight is determined by its size, with larger diamonds weighing more. Learn more about carat here.
However, it's important to note that carat weight is not the same as size, as other factors such as depth and shape can also impact how large a diamond appears.
Get an expert opinion on this diamond
Hand Image BackgroundHand Image
Actual diamond size on size 6 hand
What they’re saying about us
“The secret to buying the perfect diamond.”
Reviews
5.0
Based on 7702 reviews
Tricia Bailey
2 days ago
Thinks the most beautiful ring I have ever had and the quality is amazing!
James
Today
Shopping was easy and it arrived quickly. I only wish that I could order more than one at a time.
Nyimul
5 days ago
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User review image thumbnail
Amazing customer service. My fiancée loves her ring. Would highly recommend!
annette
Today
Great customer service, pendant was beautiful, great price and quality.
John Rouff
5 days ago
My fiance absolutely loves the ring. The stone is absolutely perfect and the ring is exactly as advertised. No ridiculous surprises. I spent alot of time shopping different sites and in person. This was the cleanest and easiest to use and provided the best options for customization. I don't plan on needing another engagement ring but I definitely plan on coming back for earrings, bracelets and any other diamond needs.
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CT
Today
Impeccable diamond quality and excellent customer service! Very fair price and quick delivery. Would highly recommend Rare Carat!
Chris Farrar
6 days ago
Band was smaller than expected, but beautiful ring. Great customer service, you feel like a priority. Cost effective compared to local jewelry stores. Waiting till our big vacation for the proposal later this year!
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jean
Today
Exceeded my expectations! Great quality for the price
Righteous Rebellion
6 days ago
I haven't yet received my ring but I juat want to say how absolutely incredible the customer service is at this place! Going through the whole online process, even while being indecisive, they were so accommodating and worked with me to create my perfect set! I just love Rare Carat. Wow.
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Juan E
Today
It was great.
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