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Marquise|Natural|GIA

1.51ct G SI1 Marquise Natural Diamond

VG • G/SI1 • GIA 2557053736

Certificate GIA 2557053736

Diamond specifications and retailer prices

From $16,487 AUD
£9,098 GBP
As of October 28, 2026
14 retailers carry this diamond
Most expensive: $23,116 AUD at NZ Jewellers · As of October 21, 2026
View at NZ Jewellers

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2557053736. Listed at 14 retailers as of October 28, 2026. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
G
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle40.83°
Pavilion angle39.35°
OriginNatural
Grading LabGIA
CertificateGIA 2557053736
Dimensions11.09 × 5.97 × 3.68 mm
L/W Ratio1.86
Top View
11.09 mm5.97 mm1.51 ctG / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2557053736
Side View
Table 60.0%Crown 40.83°Girdle: THN-VTKPavilion 39.35°Culet: NoneDepth 61.7%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 28
Current: $23,116 AUD|Low: $13,727 AUD|High: $23,116 AUD|Avg: $17,063 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 28, 2026
Retailer 4$13,727 AUD
Retailer 11$13,869 AUD
Retailer 12$15,025 AUD
Retailer 6$15,253 AUD
Retailer 10$15,256 AUD
Retailer 7$15,622 AUD
Retailer 2$16,487 AUD
Retailer 3$17,337 AUD
Retailer 5$17,354 AUD
Retailer 9$20,132 AUD
Retailer 8$21,777 AUD
NZ Jewellers$23,116 AUD

38 data points across 12 retailers

14 retailers

Retailer 1
-
$12,869 AUD
$9,019 USD
Price last confirmed 10 days ago
Retailer 2
-
$13,727 AUD
$9,620 USD
View
Price last confirmed 10 days ago
Retailer 3
-
$13,869 AUD
$9,720 USD
View
Price last confirmed 17 days ago
Retailer 4
-
$13,985 AUD
$9,801 USD
View
Price last confirmed 11 days ago
Retailer 5
-
$15,025 AUD
$10,530 USD
View
Price last confirmed 11 days ago
Retailer 6
-
$15,253 AUD
View
Price last confirmed 11 days ago
Retailer 7
-
$15,256 AUD
$10,692 USD
View
Price last confirmed 16 days ago
Retailer 8
-
$15,903 AUD
$11,145 USD
View
Price last confirmed 12 days ago
B
Retailer 9
-
$16,487 AUD
£9,098 GBP
View
Retailer 10
-
$17,337 AUD
$12,150 USD
View
Price last confirmed 12 days ago
Retailer 11
-
$18,250 AUD
$12,790 USD
View
Price last confirmed 10 days ago
Retailer 12
-
$20,132 AUD
ZAR 227,926 ZAR
View
Price last confirmed 16 days ago
Retailer 13
-
$21,777 AUD
£12,017 GBP
View
Price last confirmed 12 days ago
Most Expensive
NZ Jewellers
669feccd-75f5-4c5a-9ddc-19dd91e4f013 · Oct 21
$23,116 AUD
$16,200 USD
View
Price last confirmed 12 days ago
13 more retailers have this diamond
Prices start from $16,487 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
$16,487 AUD