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Radiant|Natural|GIA

1.51ct I SI1 Radiant Natural Diamond

EX • I/SI1 • GIA 6183608449

Certificate GIA 6183608449

Diamond specifications and retailer prices

From $6,947 NZD
$3,909 USD
As of November 2, 2026
Save $7,681 NZD (53%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $14,629 NZD at MOH London · As of October 29, 2026
View at MOH London

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6183608449. Listed at 16 retailers as of October 29, 2026, with prices from $6,947 to $14,629, a $7,681 spread on the same certified stone. MOH London lists it at $14,629. 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6183608449
Dimensions7.34 × 5.85 × 4.09 mm
L/W Ratio1.25
Culet sizeNone
Top View
7.34 mm5.85 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6183608449
Side View
Table 65.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 69.9%

Caratlytics Score

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

Price History

Last verified: Nov 2
Current: $14,629 NZD|Low: $6,857 NZD|High: $14,728 NZD|Avg: $8,960 NZD|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 2, 2026
Retailer 15$6,947 NZD
Retailer 9$7,091 NZD
Retailer 3$7,138 NZD
Retailer 4$7,304 NZD
Retailer 6$7,816 NZD
Retailer 5$8,716 NZD
Retailer 14$8,737 NZD
Retailer 8$9,120 NZD
Retailer 11$9,210 NZD
Retailer 10$9,295 NZD
Retailer 13$9,295 NZD
Retailer 12$9,597 NZD
Retailer 2$9,749 NZD
Retailer 7$10,084 NZD
MOH London$14,629 NZD

43 data points across 15 retailers

16 retailers$6,947 NZD to $14,629 NZD

A
Cheapest Retailer
-
$6,947 NZD
$3,909 USD
Retailer 2
-
$7,091 NZD
$3,990 USD
View
Price last confirmed 12 days ago
A
Retailer 3
-
$7,138 NZD
$4,016 USD
View
A
Retailer 4
-
$7,304 NZD
$4,110 USD
View
A
Retailer 5
-
$7,547 NZD
A$6,533 AUD
View
A
Retailer 6
-
$7,816 NZD
CA$6,108 CAD
View
A
Retailer 7
-
$8,716 NZD
$4,904 USD
View
A
Retailer 8
-
$8,737 NZD
$4,916 USD
View
A
Retailer 9
-
$9,120 NZD
£4,041 GBP
View
Retailer 10
-
$9,210 NZD
A$7,973 AUD
View
Price last confirmed 23 days ago
B+
Retailer 11
-
$9,295 NZD
$5,230 USD
View
B+
Retailer 12
-
$9,295 NZD
$5,230 USD
View
B+
Retailer 13
-
$9,597 NZD
$5,400 USD
View
B+
Retailer 14
-
$9,749 NZD
€5,224 EUR
View
Retailer 15
-
$10,084 NZD
$5,674 USD
View
Price last confirmed 10 days ago
Most Expensive
B
MOH London
308625714 · Oct 29
$14,629 NZD
£6,481 GBP
View
15 more retailers have this diamond
Prices start from $6,947 NZDSave up to $7,681 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
1.51ct Radiant
$6,947 NZD