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Cushion|Natural|GIA

0.30ct H SI1 Cushion Natural Diamond

EX • H/SI1 • GIA 6551537251

Certificate GIA 6551537251

Diamond specifications and retailer prices

From £278 GBP
$372 USD
As of October 29, 2026
Save £320 GBP (54%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £598 GBP at MOH London · As of October 29, 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 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 6551537251. Listed at 9 retailers as of October 29, 2026, with prices from £278 to £598, a £320 spread on the same certified stone. MOH London lists it at £598. 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

0.30
Carat
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551537251
Dimensions3.70 × 3.66 × 2.59 mm
L/W Ratio1.01
Key to symbols
Feather
Top View
3.70 mm3.66 mm0.30 ctH / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateGIA 6551537251
Side View
Table 65.0%CrownGirdle: MED-ETKPavilionCulet: NoneDepth 70.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £598 GBP|Low: £275 GBP|High: £598 GBP|Avg: £421 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 7£278 GBP
Retailer 8£297 GBP
Retailer 3£334 GBP
Retailer 6£353 GBP
Retailer 5£400 GBP
Retailer 9£410 GBP
Retailer 4£477 GBP
Retailer 2£522 GBP
MOH London£598 GBP

36 data points across 9 retailers

9 retailers£278 GBP to £598 GBP

B+
Cheapest Retailer
-
£278 GBP
$372 USD
B+
Retailer 2
-
£297 GBP
$398 USD
View
B
Retailer 3
-
£334 GBP
View
B+
Retailer 4
-
£353 GBP
View
B
Retailer 5
-
£400 GBP
ZAR 8,650 ZAR
View
Retailer 6
-
£410 GBP
A$845 AUD
View
Price last confirmed 29 days ago
B
Retailer 7
-
£477 GBP
€609 EUR
View
B
Retailer 8
-
£522 GBP
View
Most Expensive
B
MOH London
596E3C07B · Oct 29
£598 GBP
View
8 more retailers have this diamond
Prices start from £278 GBPSave up to £320 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.

B+
0.30ct Cushion
£278 GBP