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Marquise|Natural|GIA

1.51ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 2547653720

Certificate GIA 2547653720

Diamond specifications and retailer prices

From $10,288 AUD
$7,210 USD
As of November 1, 2026
Save $8,472 AUD (45%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $18,760 AUD at MOH London · As of November 2, 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 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 2547653720. Listed at 12 retailers as of November 1, 2026, with prices from $10,288 to $18,760, a $8,472 spread on the same certified stone. MOH London lists it at $18,760. 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
PolishVery Good
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 2547653720
Dimensions10.55 × 5.97 × 3.75 mm
L/W Ratio1.77
Top View
10.55 mm5.97 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
CertificateGIA 2547653720
Side View
Table 57.0%CrownGirdle: VTK-ETKPavilionCulet: NoneDepth 62.8%

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: $18,760 AUD|Low: $10,288 AUD|High: $18,984 AUD|Avg: $13,828 AUD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 6$10,288 AUD
Retailer 8$10,648 AUD
Retailer 9$12,087 AUD
Retailer 5$12,459 AUD
Retailer 7$12,691 AUD
Retailer 11$12,871 AUD
Retailer 12$12,871 AUD
Retailer 3$13,299 AUD
Retailer 2$14,705 AUD
Retailer 10$14,821 AUD
Retailer 4$16,913 AUD
MOH London$18,760 AUD

31 data points across 12 retailers

12 retailers$10,288 AUD to $18,760 AUD

B+
Cheapest Retailer
-
$10,288 AUD
$7,210 USD
B+
Retailer 2
-
$10,648 AUD
$7,462 USD
View
B
Retailer 3
-
$12,087 AUD
$8,471 USD
View
B+
Retailer 4
-
$12,459 AUD
£6,875 GBP
View
Retailer 5
-
$12,691 AUD
View
Price last confirmed 10 days ago
B
Retailer 6
-
$12,871 AUD
$9,020 USD
View
B
Retailer 7
-
$12,871 AUD
$9,020 USD
View
B
Retailer 8
-
$13,299 AUD
$9,320 USD
View
B
Retailer 9
-
$13,464 AUD
$9,436 USD
View
B
Retailer 10
-
$14,705 AUD
€9,815 EUR
View
Retailer 11
-
$14,821 AUD
$10,387 USD
View
Price last confirmed 18 days ago
Most Expensive
B
MOH London
05593552D · Nov 2
$18,760 AUD
£10,352 GBP
View
11 more retailers have this diamond
Prices start from $10,288 AUDSave up to $8,472 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
$10,288 AUD