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Cushion|Natural|GIA

0.31ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 2557421521

Certificate GIA 2557421521

Diamond specifications and retailer prices

From HK$1,275 HKD
₹15,479 INR
As of November 1, 2026
Save HK$2,989 HKD (70%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: HK$4,265 HKD at MOH London · As of November 1, 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 J 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 2557421521. Listed at 9 retailers as of November 1, 2026, with prices from HK$1,275 to HK$4,265, a HK$2,989 spread on the same certified stone. MOH London lists it at HK$4,265. 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 2557421521
Dimensions3.75 × 3.74 × 2.51 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Needle, Twinning Wisp, Crystal
Top View
3.75 mm3.74 mm0.31 ctJ / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
CertificateGIA 2557421521
Side View
Table 65.0%CrownGirdle: THK-XTKPavilionCulet: NoneDepth 67.0%

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 1
Current: HK$4,265 HKD|Low: HK$1,272 HKD|High: HK$4,444 HKD|Avg: HK$2,826 HKD|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 3HK$1,275 HKD
Retailer 6HK$1,985 HKD
Retailer 8HK$2,134 HKD
Retailer 2HK$2,859 HKD
Retailer 5HK$2,862 HKD
Retailer 7HK$3,115 HKD
Retailer 9HK$3,138 HKD
Retailer 4HK$3,674 HKD
MOH LondonHK$4,265 HKD

36 data points across 9 retailers

9 retailersHK$1,275 HKD to HK$4,265 HKD

A
Cheapest Retailer
-
HK$1,275 HKD
₹15,479 INR
A
Retailer 2
-
HK$1,985 HKD
$253 USD
View
A
Retailer 3
-
HK$2,134 HKD
$272 USD
View
B+
Retailer 4
-
HK$2,859 HKD
£287 GBP
View
B+
Retailer 5
-
HK$2,862 HKD
ZAR 5,893 ZAR
View
B
Retailer 6
-
HK$3,115 HKD
$397 USD
View
Retailer 7
-
HK$3,138 HKD
A$615 AUD
View
Price last confirmed 29 days ago
B
Retailer 8
-
HK$3,674 HKD
€446 EUR
View
Most Expensive
B
MOH London
886378A03 · Nov 1
HK$4,265 HKD
£428 GBP
View
8 more retailers have this diamond
Prices start from HK$1,275 HKDSave up to HK$2,989 HKD

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
HK$1,275 HKD