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Cushion|Natural|GIA

0.30ct J SI1 Cushion Natural Diamond

GD • J/SI1 • GIA 1525418159

Certificate GIA 1525418159

Diamond specifications and retailer prices

From £138 GBP
₹17,563 INR
As of November 2, 2026
Save £319 GBP (70%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £457 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 0.3ct natural cushion diamond

This 0.3ct natural cushion sits in the sub-half-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1525418159. Listed at 11 retailers as of November 1, 2026, with prices from £138 to £457, a £319 spread on the same certified stone. MOH London lists it at £457. 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

0.30
Carat
J
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1525418159
Dimensions3.82 × 3.81 × 2.56 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Cloud, Crystal
Top View
3.82 mm3.81 mm0.30 ctJ / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1525418159
Side View
Table 59.0%CrownGirdle: STK-ETKPavilionCulet: NoneDepth 67.3%

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 2
Current: £457 GBP|Low: £137 GBP|High: £463 GBP|Avg: £281 GBP|-0.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 2£138 GBP
Retailer 9£209 GBP
Retailer 7£213 GBP
Retailer 10£228 GBP
Retailer 4£250 GBP
Retailer 8£295 GBP
Retailer 5£307 GBP
Retailer 11£315 GBP
Retailer 3£328 GBP
Retailer 6£383 GBP
MOH London£457 GBP

36 data points across 11 retailers

11 retailers£138 GBP to £457 GBP

A
Cheapest Retailer
-
£138 GBP
₹17,563 INR
B+
Retailer 2
-
£209 GBP
$280 USD
View
B+
Retailer 3
-
£213 GBP
$285 USD
View
B+
Retailer 4
-
£228 GBP
$306 USD
View
B+
Retailer 5
-
£250 GBP
View
B
Retailer 6
-
£295 GBP
$395 USD
View
B
Retailer 7
-
£307 GBP
ZAR 6,635 ZAR
View
B
Retailer 8
-
£315 GBP
$422 USD
View
Retailer 9
-
£328 GBP
A$675 AUD
View
Price last confirmed 29 days ago
B
Retailer 10
-
£383 GBP
€489 EUR
View
Most Expensive
C
MOH London
E978414B7 · Nov 1
£457 GBP
View
10 more retailers have this diamond
Prices start from £138 GBPSave up to £319 GBP

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
0.30ct Cushion
£138 GBP