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Marquise|Natural|GIA

1.51ct D SI2 Marquise Natural Diamond

EX • D/SI2 • GIA 2556189473

Certificate GIA 2556189473

Diamond specifications and retailer prices

From $6,371 USD
SGD 8,610 SGD
As of November 1, 2026
Save $2,115 USD (25%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $8,486 USD at The Diamond Guys · As of October 31, 2026
View at The Diamond Guys

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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2556189473. Listed at 9 retailers as of October 31, 2026, with prices from $6,371 to $8,486, a $2,115 spread on the same certified stone. The Diamond Guys lists it at $8,486. 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
Color
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.8°
Pavilion angle38.25°
OriginNatural
Grading LabGIA
CertificateGIA 2556189473
Dimensions11.31 × 5.98 × 3.69 mm
L/W Ratio1.89
Top View
11.31 mm5.98 mm1.51 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556189473
Side View
Table 59.0%Crown 39.8°Girdle: STK-THKPavilion 38.25°Culet: NoneDepth 61.8%

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 1
Current: $7,030 USD|Low: $6,371 USD|High: $8,859 USD|Avg: $7,447 USD|-8.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 4$6,371 USD
Retailer 3$6,549 USD
Retailer 5$6,633 USD
Retailer 8$6,835 USD
Retailer 1$7,030 USD
Retailer 2$7,120 USD
Retailer 7$7,963 USD
Retailer 6$8,155 USD
Retailer 9$8,429 USD

43 data points across 9 retailers

9 retailers$6,371 USD to $8,486 USD

A
Cheapest Retailer
-
$6,371 USD
SGD 8,610 SGD
A
Retailer 2
-
$6,549 USD
View
A
Retailer 3
-
$6,633 USD
SGD 8,963 SGD
View
A
Retailer 4
-
$6,835 USD
View
A
Retailer 5
-
$7,030 USD
£5,536 GBP
View
A
Retailer 6
-
$7,120 USD
View
A
Retailer 7
-
$7,963 USD
View
A
Retailer 8
-
$8,155 USD
View
Most Expensive
A
The Diamond Guys
1955282050 · Oct 31
$8,486 USD
View
8 more retailers have this diamond
Prices start from $6,371 USDSave up to $2,115 USD

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
$6,371 USD