CaratHunter
Plans
Radiant|Natural|GIA

1.51ct D SI1 Radiant Natural Diamond

EX • D/SI1 • GIA 2215189168

Certificate GIA 2215189168

Diamond specifications and retailer prices

From $17,702 AUD
£9,791 GBP
As of November 2, 2026
Save $7,857 AUD (31%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $25,559 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2215189168. Listed at 4 retailers as of November 1, 2026, with prices from $17,702 to $25,559, a $7,857 spread on the same certified stone. MOH London lists it at $25,559. 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
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2215189168
Dimensions8.51 × 5.05 × 3.44 mm
L/W Ratio1.69
Culet sizeNone
Cert comments
Pinpoints are not shown.
Top View
8.51 mm5.05 mm1.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2215189168
Side View
Table 69.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 68.2%

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 2
Current: $25,559 AUD|Low: $15,032 AUD|High: $25,867 AUD|Avg: $19,403 AUD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 2, 2026
Retailer 5$15,032 AUD
Retailer 3$17,702 AUD
Retailer 4$17,801 AUD
Retailer 2$20,615 AUD
MOH London$25,559 AUD

44 data points across 5 retailers

4 retailers$17,702 AUD to $25,559 AUD

B+
Cheapest Retailer
-
$17,702 AUD
£9,791 GBP
Retailer 2
-
$17,801 AUD
View
Price last confirmed 9 days ago
B
Retailer 3
-
$20,615 AUD
€13,791 EUR
View
Most Expensive
B
MOH London
9113D6DB2 · Nov 1
$25,559 AUD
£14,137 GBP
View
3 more retailers have this diamond
Prices start from $17,702 AUDSave up to $7,857 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
$17,702 AUD