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Marquise|Natural|GIA

1.51ct D SI1 Marquise Natural Diamond

EX • D/SI1 • GIA 7546359548

Certificate GIA 7546359548

Diamond specifications and retailer prices

From $16,415 AUD
As of November 1, 2026
Save $11,827 AUD (42%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $28,242 AUD at MOH London · As of November 1, 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 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 7546359548. Listed at 16 retailers as of November 1, 2026, with prices from $16,415 to $28,242, a $11,827 spread on the same certified stone. MOH London lists it at $28,242. 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
Crown angle32.98°
Pavilion angle40.36°
OriginNatural
Grading LabGIA
CertificateGIA 7546359548
Dimensions11.45 × 6.22 × 3.71 mm
L/W Ratio1.84
Girdle conditionVery Thick
Key to symbols
Feather, Cloud, Pinpoint
Top View
11.45 mm6.22 mm1.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 7546359548
Side View
Table 64.0%Crown 32.98°GirdlePavilion 40.36°Culet: NDepth 59.6%

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: $28,242 AUD|Low: $15,899 AUD|High: $28,582 AUD|Avg: $21,727 AUD|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 8$16,415 AUD
Retailer 10$19,129 AUD
Retailer 4$19,300 AUD
Retailer 9$19,413 AUD
Retailer 7$19,960 AUD
Retailer 2$20,231 AUD
Retailer 5$21,623 AUD
Retailer 3$22,777 AUD
Retailer 6$26,567 AUD
MOH London$28,242 AUD

32 data points across 10 retailers

16 retailers$16,415 AUD to $28,242 AUD

B+
Cheapest Retailer
-
$16,415 AUD
B
Retailer 2
-
$18,298 AUD
$12,853 USD
View
B
Retailer 3
-
$18,520 AUD
$13,009 USD
View
B
Retailer 4
-
$19,129 AUD
$13,437 USD
View
Final sale: no returns
B+
Retailer 5
-
$19,300 AUD
£10,675 GBP
View
Retailer 6
-
$19,413 AUD
View
Price last confirmed 9 days ago
B
Retailer 7
-
$19,596 AUD
$13,765 USD
View
B
Retailer 8
-
$19,960 AUD
$14,021 USD
View
Retailer 9
-
$19,960 AUD
$14,021 USD
View
Price last confirmed 17 days ago
B+
Retailer 10
-
$20,231 AUD
£11,190 GBP
View
B
Retailer 11
-
$21,227 AUD
$14,911 USD
View
B
Retailer 12
-
$21,623 AUD
$15,189 USD
View
Retailer 13
-
$22,456 AUD
$15,774 USD
View
Price last confirmed 44 days ago
B
Retailer 14
-
$22,777 AUD
€15,238 EUR
View
B
Retailer 15
-
$26,567 AUD
ZAR 301,479 ZAR
View
Most Expensive
B
MOH London
C167A3398 · Nov 1
$28,242 AUD
£15,621 GBP
View
15 more retailers have this diamond
Prices start from $16,415 AUDSave up to $11,827 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
$16,415 AUD