Marquise|Natural|GIA

2.51ct I SI2 Marquise Natural Diamond

GD • I/SI2 • GIA 1553744455

Certificate GIA 1553744455

Diamond specifications and retailer prices

From $20,870 USD
As of October 26, 2026
Save $14,633 USD (41%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $35,503 USD at MOH London · As of October 26, 2026
View at MOH London

About this 2.51ct natural marquise diamond

This 2.51ct natural marquise sits in the two to three carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1553744455. Listed at 25 retailers as of October 26, 2026, with prices from $20,870 to $35,503, a $14,633 spread on the same certified stone. MOH London lists it at $35,503. 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

2.51
Carat
I
Color
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.16°
Pavilion angle39.4°
OriginNatural
Grading LabGIA
CertificateGIA 1553744455
Dimensions12.40 × 6.80 × 4.60 mm
L/W Ratio1.82
Culet sizeNone
Top View
12.40 mm6.80 mm2.51 ctI / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1553744455
Side View
Table 58.0%Crown 43.16°Girdle: STK-VTKPavilion 39.4°Culet: NoneDepth 67.8%

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: Oct 26
Current: $35,503 USD|Low: $18,260 USD|High: $35,883 USD|Avg: $23,771 USD|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 9$20,870 USD
Retailer 8$21,207 USD
Retailer 2$21,468 USD
Retailer 7$21,756 USD
Retailer 5$21,912 USD
Retailer 3$22,928 USD
Retailer 4$26,442 USD
Retailer 6$27,317 USD
MOH London$35,503 USD

45 data points across 9 retailers

25 retailers$20,870 USD to $35,503 USD

B+
Cheapest Retailer
-
$20,870 USD
Retailer 2
-
$21,036 USD
View
Price last confirmed 8 days ago
B+
Retailer 3
-
$21,207 USD
View
B+
Retailer 4
-
$21,468 USD
₹2,044,612 INR
View
B+
Retailer 5
-
$21,515 USD
A$33,101 AUD
View
B+
Retailer 6
-
$21,912 USD
View
Retailer 7
-
$22,702 USD
View
Price last confirmed 24 days ago
B+
Retailer 8
-
$22,928 USD
£18,054 GBP
View
B+
Retailer 9
-
$23,022 USD
View
Retailer 10
-
$23,837 USD
View
Price last confirmed 31 days ago
Retailer 11
-
$24,262 USD
View
Price last confirmed 7 days ago
B+
Retailer 12
-
$24,380 USD
View
B+
Retailer 13
-
$24,380 USD
View
Retailer 14
-
$24,594 USD
View
Price last confirmed 24 days ago
Retailer 15
-
$24,594 USD
View
Price last confirmed 37 days ago
B+
Retailer 16
-
$24,861 USD
A$38,248 AUD
View
B
Retailer 17
-
$25,190 USD
View
Retailer 18
-
$25,540 USD
View
Price last confirmed 56 days ago
Retailer 19
-
$25,540 USD
View
Price last confirmed 33 days ago
Retailer 20
-
$25,881 USD
View
Price last confirmed 9 days ago
B
Retailer 21
-
$26,442 USD
€25,183 EUR
View
Retailer 22
-
$27,317 USD
View
Price last confirmed 8 days ago
Retailer 23
-
$32,161 USD
View
Price last confirmed 37 days ago
Retailer 24
-
$32,161 USD
View
Price last confirmed 33 days ago
Most Expensive
B
MOH London
3DD4EB45D · Oct 26
$35,503 USD
£27,955 GBP
View
24 more retailers have this diamond
Prices start from $20,870 USDSave up to $14,633 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+
2.51ct Marquise
$20,870 USD