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Marquise|Natural|GIA

1.51ct H SI1 Marquise Natural Diamond

ID • H/SI1 • GIA 2567421638

Certificate GIA 2567421638

Diamond specifications and retailer prices

From $10,437 AUD
As of November 6, 2026
Save $8,160 AUD (44%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $18,596 AUD at MOH London · As of November 4, 2026
View at MOH London

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded H 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 2567421638. Listed at 7 retailers as of November 4, 2026, with prices from $10,437 to $18,596, a $8,160 spread on the same certified stone. MOH London lists it at $18,596. 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
H
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 2567421638
Dimensions11.70 × 6.15 × 3.57 mm
L/W Ratio1.90
Culet sizeNone
Top View
11.70 mm6.15 mm1.51 ctH / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 2567421638
Side View
Table 60.0%CrownGirdle: STK-THKPavilionCulet: NDepth 58.0%

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 6
Current: $18,596 AUD|Low: $10,760 AUD|High: $18,596 AUD|Avg: $12,723 AUD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 4$10,760 AUD
Retailer 5$11,013 AUD
Retailer 6$11,506 AUD
Retailer 2$12,359 AUD
Retailer 3$13,260 AUD
MOH London$18,596 AUD

4 data points across 6 retailers

7 retailers$10,437 AUD to $18,596 AUD

B+
Cheapest Retailer
-
$10,437 AUD
B+
Retailer 2
-
$10,760 AUD
View
B+
Retailer 3
-
$11,013 AUD
View
B+
Retailer 4
-
$11,506 AUD
View
B+
Retailer 5
-
$12,359 AUD
View
B
Retailer 6
-
$13,260 AUD
View
Most Expensive
B
MOH London
F14C0F569 · Nov 4
$18,596 AUD
£10,061 GBP
View
6 more retailers have this diamond
Prices start from $10,437 AUDSave up to $8,160 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 Marquise
$10,437 AUD