Cushion|Natural|GIA

0.31ct H SI1 Cushion Natural Diamond

EX • H/SI1 • GIA 2557871850

Certificate GIA 2557871850

Diamond specifications and retailer prices

From $344 USD
As of October 28, 2026
Save $490 USD (59%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $834 USD at MOH London · As of October 26, 2026
View at MOH London

About this 0.31ct natural cushion diamond

This 0.31ct natural cushion sits in the sub-half-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 2557871850. Listed at 9 retailers as of October 26, 2026, with prices from $344 to $834, a $490 spread on the same certified stone. MOH London lists it at $834. 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

0.31
Carat
H
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557871850
Dimensions3.89 × 3.71 × 2.55 mm
L/W Ratio1.05
Key to symbols
Crystal
Top View
3.89 mm3.71 mm0.31 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2557871850
Side View
Table 64.0%CrownGirdle: STK-VTKPavilionCulet: NDepth 68.7%

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 28
Current: $834 USD|Low: $344 USD|High: $843 USD|Avg: $588 USD|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 29, 2026
Retailer 6$344 USD
Retailer 3$392 USD
Retailer 2$471 USD
Retailer 7$495 USD
Retailer 8$559 USD
Retailer 9$578 USD
Retailer 5$667 USD
Retailer 4$740 USD
MOH London$834 USD

36 data points across 9 retailers

9 retailers$344 USD to $834 USD

A
Cheapest Retailer
-
$344 USD
B+
Retailer 2
-
$392 USD
View
B
Retailer 3
-
$471 USD
£371 GBP
View
B+
Retailer 4
-
$495 USD
£390 GBP
View
B
Retailer 5
-
$559 USD
ZAR 9,026 ZAR
View
B
Retailer 6
-
$578 USD
A$890 AUD
View
Price last confirmed 25 days ago
B
Retailer 7
-
$667 USD
€635 EUR
View
B
Retailer 8
-
$740 USD
£583 GBP
View
Most Expensive
B
MOH London
073C9E438 · Oct 26
$834 USD
£657 GBP
View
8 more retailers have this diamond
Prices start from $344 USDSave up to $490 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
0.31ct Cushion
$344 USD