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Marquise|Natural|GIA

2.51ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 2557437360

Certificate GIA 2557437360

Diamond specifications and retailer prices

From $40,701 NZD
As of November 4, 2026
Save $28,930 NZD (42%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $69,631 NZD at MOH London · As of November 4, 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557437360. Listed at 22 retailers as of November 4, 2026, with prices from $40,701 to $69,631, a $28,930 spread on the same certified stone. MOH London lists it at $69,631. 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

2.51
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle38.37°
Pavilion angle41.81°
OriginNatural
Grading LabGIA
CertificateGIA 2557437360
Dimensions13.17 × 7.01 × 4.60 mm
L/W Ratio1.88
Girdle conditionVery Thick
Culet sizeNone
Key to symbols
Feather, Knot, Cloud, Crystal, Cavity, Needle, Indented Natural
Top View
13.17 mm7.01 mm2.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2557437360
Side View
Table 60.0%Crown 38.37°GirdlePavilion 41.81°Culet: NoneDepth 65.6%

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: Nov 4
Current: $69,631 NZD|Low: $40,701 NZD|High: $70,658 NZD|Avg: $50,455 NZD|-1.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 9$40,701 NZD
Retailer 8$42,841 NZD
Retailer 10$43,537 NZD
Retailer 7$44,704 NZD
Retailer 5$44,996 NZD
Retailer 3$45,065 NZD
Retailer 11$45,076 NZD
Retailer 2$51,157 NZD
Retailer 6$54,014 NZD
Retailer 4$61,387 NZD
MOH London$69,631 NZD

39 data points across 11 retailers

22 retailers$40,701 NZD to $69,631 NZD

B+
Cheapest Retailer
-
$40,701 NZD
B+
Retailer 2
-
$42,841 NZD
View
Final sale: no returns
B+
Retailer 3
-
$43,537 NZD
View
Retailer 4
-
$44,704 NZD
View
Price last confirmed 9 days ago
B+
Retailer 5
-
$44,996 NZD
View
Retailer 6
-
$45,065 NZD
View
Price last confirmed 34 days ago
B+
Retailer 7
-
$45,076 NZD
View
Retailer 8
-
$46,939 NZD
View
Price last confirmed 37 days ago
B+
Retailer 9
-
$46,939 NZD
View
B+
Retailer 10
-
$47,782 NZD
View
Retailer 11
-
$48,429 NZD
View
Price last confirmed 30 days ago
Retailer 12
-
$48,429 NZD
View
Price last confirmed 16 days ago
B
Retailer 13
-
$49,782 NZD
View
B
Retailer 14
-
$50,293 NZD
View
Retailer 15
-
$50,293 NZD
View
Price last confirmed 29 days ago
Retailer 16
-
$50,293 NZD
View
Price last confirmed 17 days ago
B
Retailer 17
-
$51,157 NZD
View
B
Retailer 18
-
$54,014 NZD
View
B
Retailer 19
-
$61,387 NZD
View
Retailer 20
-
$63,331 NZD
View
Price last confirmed 17 days ago
Retailer 21
-
$63,331 NZD
View
Price last confirmed 39 days ago
Most Expensive
B
MOH London
6C219CCA7 · Nov 4
$69,631 NZD
£30,394 GBP
View
21 more retailers have this diamond
Prices start from $40,701 NZDSave up to $28,930 NZD

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
$40,701 NZD