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Radiant|Natural|GIA

1.51ct J SI1 Radiant Natural Diamond

EX • J/SI1 • GIA 1548772947

Certificate GIA 1548772947

Diamond specifications and retailer prices

From $6,180 AUD
$4,341 USD
As of November 1, 2026
Save $6,279 AUD (50%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $12,459 AUD at MOH London · As of November 1, 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 J 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 1548772947. Listed at 14 retailers as of November 1, 2026, with prices from $6,180 to $12,459, a $6,279 spread on the same certified stone. MOH London lists it at $12,459. 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle49.57°
Pavilion angle35.79°
OriginNatural
Grading LabGIA
CertificateGIA 1548772947
Dimensions7.81 × 5.66 × 3.82 mm
L/W Ratio1.38
Girdle conditionVery Thick
Key to symbols
Knot, Needle, Pinpoint
Top View
7.81 mm5.66 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1548772947
Side View
Table 69.0%Crown 49.57°Girdle: THK-VTKPavilion 35.79°Culet: NoneDepth 67.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $12,459 AUD|Low: $6,670 AUD|High: $12,609 AUD|Avg: $8,488 AUD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 7$6,670 AUD
Retailer 6$7,457 AUD
Retailer 2$7,526 AUD
Retailer 3$7,632 AUD
Retailer 5$7,886 AUD
Retailer 4$9,615 AUD
MOH London$12,459 AUD

44 data points across 7 retailers

14 retailers$6,180 AUD to $12,459 AUD

B+
Cheapest Retailer
-
$6,180 AUD
$4,341 USD
B+
Retailer 2
-
$6,596 AUD
$4,633 USD
View
B+
Retailer 3
-
$6,670 AUD
$4,685 USD
View
B
Retailer 4
-
$7,457 AUD
$5,238 USD
View
B
Retailer 5
-
$7,501 AUD
$5,269 USD
View
B
Retailer 6
-
$7,526 AUD
£4,163 GBP
View
B+
Retailer 7
-
$7,632 AUD
£4,221 GBP
View
Retailer 8
-
$7,886 AUD
View
Price last confirmed 23 days ago
B
Retailer 9
-
$7,944 AUD
$5,580 USD
View
B
Retailer 10
-
$7,944 AUD
$5,580 USD
View
B
Retailer 11
-
$8,200 AUD
$5,760 USD
View
Retailer 12
-
$8,631 AUD
$6,063 USD
View
Price last confirmed 10 days ago
B
Retailer 13
-
$9,615 AUD
ZAR 109,114 ZAR
View
Most Expensive
B
MOH London
1725D7B22 · Nov 1
$12,459 AUD
£6,891 GBP
View
13 more retailers have this diamond
Prices start from $6,180 AUDSave up to $6,279 AUD

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
$6,180 AUD