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Marquise|Natural|GIA

1.51ct K SI1 Marquise Natural Diamond

EX • K/SI1 • GIA 5241109438

Certificate GIA 5241109438

Diamond specifications and retailer prices

From $4,785 AUD
As of November 4, 2026
Save $3,888 AUD (45%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $8,674 AUD at Wholesale Diamonds Direct · As of November 6, 2026
View at Wholesale Diamonds Direct

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5241109438. Listed at 9 retailers as of November 4, 2026, with prices from $4,785 to $8,674, a $3,888 spread on the same certified stone. Wholesale Diamonds Direct lists it at $8,674. 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle40.07°
Pavilion angle40.14°
OriginNatural
Grading LabGIA
CertificateGIA 5241109438
Dimensions11.11 × 5.88 × 3.77 mm
L/W Ratio1.89
Culet sizeNone
Top View
11.11 mm5.88 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5241109438
Side View
Table 59.0%Crown 40.07°Girdle: STK-THKPavilion 40.14°Culet: NDepth 64.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $6,364 AUD|Low: $4,785 AUD|High: $8,674 AUD|Avg: $6,079 AUD|-0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Wholesale Diamonds Direct
November 6, 2026
Retailer 5$4,785 AUD
Retailer 4$5,113 AUD
Retailer 7$5,222 AUD
Retailer 8$5,817 AUD
Retailer 2$6,097 AUD
Retailer 6$6,175 AUD
Retailer 1$6,364 AUD
Retailer 3$8,070 AUD
Wholesale Diamonds Direct$8,674 AUD

6 data points across 9 retailers

9 retailers$4,785 AUD to $8,674 AUD

A
Cheapest Retailer
-
$4,785 AUD
A
Retailer 2
-
$5,113 AUD
View
A
Retailer 3
-
$5,222 AUD
View
B+
Retailer 4
-
$5,817 AUD
View
B+
Retailer 5
-
$6,097 AUD
View
B+
Retailer 6
-
$6,175 AUD
View
B+
Retailer 7
-
$6,364 AUD
View
B+
Retailer 8
-
$8,070 AUD
View
Most Expensive
B+
Wholesale Diamonds Direct
668871297 · Nov 6
$8,674 AUD
$5,960 USD
View
8 more retailers have this diamond
Prices start from $4,785 AUDSave up to $3,888 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.

A
1.51ct Marquise
$4,785 AUD