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Radiant|Natural|GIA

1.51ct K SI1 Radiant Natural Diamond

EX • K/SI1 • GIA 6552381241

Certificate GIA 6552381241

Diamond specifications and retailer prices

From $8,309 NZD
As of November 5, 2026
Save $44 NZD (1%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $8,353 NZD at 77 Diamonds · As of November 7, 2026
View at 77 Diamonds

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6552381241. Listed at 4 retailers as of November 5, 2026, with a relatively tight 1% spread, which is unusual at this carat range and suggests competitive pricing across the listings. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6552381241
Dimensions7.57 × 5.72 × 3.88 mm
L/W Ratio1.32
Culet sizeNone
Top View
7.57 mm5.72 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552381241
Side View
Table 67.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 67.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 5
Current: $8,353 NZD|Low: $4,892 NZD|High: $9,128 NZD|Avg: $6,644 NZD|+49.3%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 11$4,892 NZD
Retailer 5$5,008 NZD
Retailer 3$5,291 NZD
Retailer 9$5,893 NZD
Retailer 7$6,456 NZD
Retailer 6$6,503 NZD
Retailer 4$6,790 NZD
Retailer 8$8,089 NZD
Retailer 2$8,309 NZD
77 Diamonds$8,353 NZD
Retailer 10$8,953 NZD

35 data points across 11 retailers

4 retailers$8,309 NZD to $8,353 NZD

Retailer 1
-
$4,892 NZD
Price last confirmed 31 days ago
Retailer 2
-
$5,893 NZD
View
Price last confirmed 31 days ago
B
Retailer 3
-
$8,309 NZD
View
Most Expensive
B+
77 Diamonds
RADJECFZJDJQ · Nov 7
$8,353 NZD
£3,646 GBP
View
3 more retailers have this diamond
Prices start from $8,309 NZDSave up to $44 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.

B+
1.51ct Radiant
$8,309 NZD