Cushion|Natural|GIA

2.51ct H SI1 Cushion Natural Diamond

EX • H/SI1 • GIA 1559675761

Certificate GIA 1559675761

Diamond specifications and retailer prices

From $17,862 USD
A$27,481 AUD
As of October 27, 2026
Save $10,506 USD (37%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $28,368 USD at MOH London · As of October 26, 2026
View at MOH London

About this 2.51ct natural cushion diamond

This 2.51ct natural cushion sits in the two to three carat band, graded H 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 1559675761. Listed at 12 retailers as of October 26, 2026, with prices from $17,862 to $28,368, a $10,506 spread on the same certified stone. MOH London lists it at $28,368. 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
H
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle37.73°
OriginNatural
Grading LabGIA
CertificateGIA 1559675761
Dimensions9.09 × 7.10 × 4.96 mm
L/W Ratio1.28
Key to symbols
Crystal, Feather, Needle, Indented Natural
Top View
9.09 mm7.10 mm2.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1559675761
Side View
Table 66.0%CrownGirdle: MED-VTKPavilion 37.73°Culet: NoneDepth 69.8%

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: Oct 27
Current: $28,368 USD|Low: $15,091 USD|High: $28,633 USD|Avg: $19,770 USD|-0.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 27, 2026
Retailer 11$15,091 USD
Retailer 5$17,085 USD
Retailer 12$17,164 USD
Retailer 8$17,462 USD
Retailer 7$18,341 USD
Retailer 3$18,793 USD
Retailer 4$20,526 USD
Retailer 6$20,700 USD
Retailer 9$20,700 USD
Retailer 10$21,390 USD
Retailer 2$21,950 USD
MOH London$28,368 USD

26 data points across 12 retailers

12 retailers$17,862 USD to $28,368 USD

Retailer 1
-
$15,091 USD
HK$117,900 HKD
Price last confirmed 15 days ago
Retailer 2
-
$17,085 USD
€16,271 EUR
View
Price last confirmed 6 days ago
Retailer 3
-
$17,164 USD
SGD 23,195 SGD
View
Price last confirmed 21 days ago
Retailer 4
-
$17,462 USD
View
Price last confirmed 8 days ago
A
Retailer 5
-
$17,862 USD
A$27,481 AUD
View
Retailer 6
-
$18,793 USD
View
Price last confirmed 12 days ago
B+
Retailer 7
-
$20,526 USD
A$31,578 AUD
View
B+
Retailer 8
-
$20,700 USD
View
B+
Retailer 9
-
$20,700 USD
View
B+
Retailer 10
-
$21,390 USD
View
B+
Retailer 11
-
$21,950 USD
€20,905 EUR
View
Most Expensive
B
MOH London
EECE8DF20 · Oct 26
$28,368 USD
£22,337 GBP
View
11 more retailers have this diamond
Prices start from $17,862 USDSave up to $10,506 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.

A
2.51ct Cushion
$17,862 USD