CaratHunter
Plans
Marquise|Natural|GIA

2.51ct I SI2 Marquise Natural Diamond

GD • I/SI2 • GIA 1553744455

Certificate GIA 1553744455

Diamond specifications and retailer prices

From £15,576 GBP
$20,870 USD
As of October 26, 2026
Save £10,921 GBP (41%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: £26,497 GBP 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 £15,576 to £26,497, a £10,921 spread on the same certified stone. MOH London lists it at £26,497. 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
Colour
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: £26,497 GBP|Low: £13,628 GBP|High: £26,780 GBP|Avg: £17,766 GBP|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 9£15,576 GBP
Retailer 8£15,827 GBP
Retailer 2£16,017 GBP
Retailer 7£16,237 GBP
Retailer 5£16,354 GBP
Retailer 3£17,112 GBP
Retailer 4£19,735 GBP
Retailer 6£20,388 GBP
MOH London£26,497 GBP

46 data points across 9 retailers

25 retailers£15,576 GBP to £26,497 GBP

B+
Cheapest Retailer
-
£15,576 GBP
$20,870 USD
Retailer 2
-
£15,700 GBP
$21,036 USD
View
Price last confirmed 9 days ago
Retailer 3
-
£15,827 GBP
$21,207 USD
View
Price last confirmed 7 days ago
B+
Retailer 4
-
£16,017 GBP
₹2,043,951 INR
View
B+
Retailer 5
-
£16,058 GBP
A$33,101 AUD
View
B+
Retailer 6
-
£16,354 GBP
$21,912 USD
View
Retailer 7
-
£16,943 GBP
$22,702 USD
View
Price last confirmed 25 days ago
B+
Retailer 8
-
£17,112 GBP
View
Retailer 9
-
£17,182 GBP
$23,022 USD
View
Price last confirmed 7 days ago
Retailer 10
-
£17,790 GBP
$23,837 USD
View
Price last confirmed 32 days ago
Retailer 11
-
£18,107 GBP
$24,262 USD
View
Price last confirmed 8 days ago
Retailer 12
-
£18,196 GBP
$24,380 USD
View
Price last confirmed 7 days ago
Retailer 13
-
£18,196 GBP
$24,380 USD
View
Price last confirmed 7 days ago
Retailer 14
-
£18,355 GBP
$24,594 USD
View
Price last confirmed 25 days ago
Retailer 15
-
£18,355 GBP
$24,594 USD
View
Price last confirmed 38 days ago
B+
Retailer 16
-
£18,555 GBP
A$38,248 AUD
View
Retailer 17
-
£18,800 GBP
$25,190 USD
View
Price last confirmed 7 days ago
Retailer 18
-
£19,061 GBP
$25,540 USD
View
Price last confirmed 56 days ago
Retailer 19
-
£19,061 GBP
$25,540 USD
View
Price last confirmed 34 days ago
Retailer 20
-
£19,316 GBP
$25,881 USD
View
Price last confirmed 10 days ago
B
Retailer 21
-
£19,735 GBP
€25,183 EUR
View
Retailer 22
-
£20,388 GBP
$27,317 USD
View
Price last confirmed 9 days ago
Retailer 23
-
£24,003 GBP
$32,161 USD
View
Price last confirmed 38 days ago
Retailer 24
-
£24,003 GBP
$32,161 USD
View
Price last confirmed 33 days ago
Most Expensive
B
MOH London
3DD4EB45D · Oct 26
£26,497 GBP
View
24 more retailers have this diamond
Prices start from £15,576 GBPSave up to £10,921 GBP

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
£15,576 GBP