Marquise|Natural|GIA

2.50ct G SI1 Marquise Natural Diamond

EX • G/SI1 • GIA 1555451099

Certificate GIA 1555451099

Diamond specifications and retailer prices

From $28,375 USD
As of November 1, 2026
Save $22,401 USD (44%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $50,776 USD at MOH London · As of November 1, 2026
View at MOH London

About this 2.5ct natural marquise diamond

This 2.5ct natural marquise sits in the two to three carat band, graded G 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 1555451099. Listed at 16 retailers as of November 1, 2026, with prices from $28,375 to $50,776, a $22,401 spread on the same certified stone. MOH London lists it at $50,776. 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

2.50
Carat
G
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.7°
Pavilion angle39.8°
OriginNatural
Grading LabGIA
CertificateGIA 1555451099
Dimensions13.38 × 7.02 × 4.35 mm
L/W Ratio1.91
Culet sizeNone
Top View
13.38 mm7.02 mm2.50 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1555451099
Side View
Table 61.0%Crown 39.7°Girdle: MED-THKPavilion 39.8°Culet: NoneDepth 61.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $50,776 USD|Low: $28,245 USD|High: $50,776 USD|Avg: $33,996 USD|+3.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 1, 2026
Retailer 8$28,592 USD
Retailer 15$29,426 USD
Retailer 3$29,600 USD
Retailer 7$31,192 USD
Retailer 6$31,452 USD
Retailer 12$31,580 USD
Retailer 10$32,473 USD
Retailer 5$32,752 USD
Retailer 16$33,866 USD
Retailer 2$34,828 USD
Retailer 4$35,165 USD
Retailer 9$35,221 USD
Retailer 13$36,576 USD
Retailer 14$38,001 USD
Retailer 11$44,957 USD
MOH London$50,776 USD

16 data points across 16 retailers

16 retailers$28,375 USD to $50,776 USD

B+
Cheapest Retailer
-
$28,375 USD
B+
Retailer 2
-
$29,426 USD
View
B+
Retailer 3
-
$29,600 USD
View
Retailer 4
-
$31,192 USD
View
Price last confirmed 16 days ago
Retailer 5
-
$31,452 USD
View
Price last confirmed 12 days ago
B+
Retailer 6
-
$31,580 USD
View
B+
Retailer 7
-
$32,473 USD
£25,569 GBP
View
Retailer 8
-
$32,752 USD
View
Price last confirmed 16 days ago
B+
Retailer 9
-
$33,866 USD
View
B+
Retailer 10
-
$34,828 USD
£27,424 GBP
View
B
Retailer 11
-
$35,165 USD
View
B
Retailer 12
-
$35,221 USD
View
B+
Retailer 13
-
$36,576 USD
View
B+
Retailer 14
-
$38,001 USD
€36,191 EUR
View
B
Retailer 15
-
$44,957 USD
ZAR 726,278 ZAR
View
Most Expensive
B
MOH London
DD5D6BCC9 · Nov 1
$50,776 USD
£39,981 GBP
View
15 more retailers have this diamond
Prices start from $28,375 USDSave up to $22,401 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.

B+
2.50ct Marquise
$28,375 USD