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Radiant|Natural|GIA

5.12ct F SI1 Radiant Natural Diamond

VG • F/SI1 • GIA 5241071918

Certificate GIA 5241071918

Diamond specifications and retailer prices

From $187,047 NZD
$105,242 USD
As of November 2, 2026
Save $20,837 NZD (10%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $207,884 NZD at William & Sons Jewelers · As of November 2, 2026
View at William & Sons Jewelers

About this 5.12ct natural radiant diamond

This 5.12ct natural radiant sits in the over five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 5241071918. Listed at 5 retailers as of November 2, 2026, with a relatively tight 11% spread, which is unusual at this carat range and suggests competitive pricing across the listings. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

5.12
Carat
F
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5241071918
Dimensions12.23 × 8.68 × 5.80 mm
L/W Ratio1.41
Top View
12.23 mm8.68 mm5.12 ctF / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5241071918
Side View
Table 67.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 66.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $192,771 NZD|Low: $187,011 NZD|High: $215,999 NZD|Avg: $201,739 NZD|-2.2%
Retailer 1
Retailer 2
Retailer 3
William & Sons Jewelers
November 2, 2026
Retailer 3$187,047 NZD
Retailer 1$192,771 NZD
Retailer 2$198,348 NZD
William & Sons Jewelers$207,884 NZD

18 data points across 4 retailers

5 retailers$187,047 NZD to $207,884 NZD

A
Cheapest Retailer
-
$187,047 NZD
$105,242 USD
A
Retailer 2
-
$192,771 NZD
₹10,329,778 INR
View
B+
Retailer 3
-
$198,348 NZD
$111,601 USD
View
B+
Retailer 4
-
$205,031 NZD
A$177,479 AUD
View
Most Expensive
B+
William & Sons Jewelers
cert_5241071918 · Nov 2
$207,884 NZD
$116,966 USD
View
Final sale: no returns
4 more retailers have this diamond
Prices start from $187,047 NZDSave up to $20,837 NZD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
5.12ct Radiant
$187,047 NZD