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Marquise|Natural|GIA

2.51ct I SI1 Marquise Natural Diamond

VG • I/SI1 • GIA 6565739246

Certificate GIA 6565739246

Diamond specifications and retailer prices

From £14,396 GBP
SGD 26,106 SGD
As of November 2, 2026
Save £12,482 GBP (46%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £26,878 GBP at With Clarity · As of November 2, 2026
View at With Clarity

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 SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6565739246. Listed at 9 retailers as of November 2, 2026, with prices from £14,396 to £26,878, a £12,482 spread on the same certified stone. With Clarity lists it at £26,878. 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
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6565739246
Dimensions12.85 × 6.95 × 4.52 mm
L/W Ratio1.85
Top View
12.85 mm6.95 mm2.51 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6565739246
Side View
Table 57.0%CrownGirdle: THN-VTKPavilionCulet: NDepth 65.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £15,614 GBP|Low: £14,396 GBP|High: £26,878 GBP|Avg: £16,850 GBP|+0.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
With Clarity
November 3, 2026
Retailer 8£14,396 GBP
Retailer 5£15,522 GBP
Retailer 1£15,614 GBP
Retailer 3£15,712 GBP
Retailer 4£15,718 GBP
Retailer 2£16,157 GBP
Retailer 6£16,428 GBP
Retailer 7£18,500 GBP
With Clarity£26,878 GBP

6 data points across 9 retailers

9 retailers£14,396 GBP to £26,878 GBP

A
Cheapest Retailer
-
£14,396 GBP
SGD 26,106 SGD
B+
Retailer 2
-
£15,522 GBP
$20,830 USD
View
A
Retailer 3
-
£15,614 GBP
View
B+
Retailer 4
-
£15,712 GBP
$21,085 USD
View
B+
Retailer 5
-
£15,718 GBP
$21,093 USD
View
A
Retailer 6
-
£16,157 GBP
$21,682 USD
View
B+
Retailer 7
-
£16,428 GBP
$22,046 USD
View
B+
Retailer 8
-
£18,500 GBP
$24,826 USD
View
Most Expensive
B
With Clarity
6565739246 · Nov 2
£26,878 GBP
$36,069 USD
View
8 more retailers have this diamond
Prices start from £14,396 GBPSave up to £12,482 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.

A
2.51ct Marquise
£14,396 GBP