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Cushion|Natural|GIA

2.51ct H SI2 Cushion Natural Diamond

VG • H/SI2 • GIA 5516059557

Certificate GIA 5516059557

Diamond specifications and retailer prices

From $16,380 USD
As of November 2, 2026
Save $1,313 USD (7%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $17,693 USD at Adiamor · As of November 1, 2026
View at Adiamor

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 SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 5516059557. Listed at 4 retailers as of November 1, 2026, with a relatively tight 8% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
H
Color
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 5516059557
Dimensions8.78 × 6.73 × 4.66 mm
L/W Ratio1.30
Top View
8.78 mm6.73 mm2.51 ctH / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 5516059557
Side View
Table 67.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 69.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 2
Current: $17,693 USD|Low: $16,054 USD|High: $25,641 USD|Avg: $18,849 USD
Adiamor
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 18, 2026
Retailer 3$16,380 USD
Retailer 4$17,516 USD
Retailer 2$17,546 USD
Adiamor$17,693 USD
Retailer 5$25,641 USD

15 data points across 5 retailers

4 retailers$16,380 USD to $17,693 USD

A
Cheapest Retailer
-
$16,380 USD
B+
Retailer 2
-
$17,516 USD
View
B+
Retailer 3
-
$17,546 USD
View
Most Expensive
B+
Adiamor
D-66179715 · Nov 1
$17,693 USD
View
3 more retailers have this diamond
Prices start from $16,380 USDSave up to $1,313 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
$16,380 USD