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Cushion|Natural|GIA

0.66ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 3305996154

Certificate GIA 3305996154

Diamond specifications and retailer prices

From £734 GBP
$985 USD
As of October 28, 2026
Save £803 GBP (52%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £1,537 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 0.66ct natural cushion diamond

This 0.66ct natural cushion sits in the half to three-quarter carat band, graded I 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 3305996154. Listed at 5 retailers as of October 28, 2026, with prices from £734 to £1,537, a £803 spread on the same certified stone. MOH London lists it at £1,537. 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

0.66
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 3305996154
Dimensions4.89 × 4.69 × 3.44 mm
L/W Ratio1.04
Top View
4.89 mm4.69 mm0.66 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryGood
FluorescenceNone
CertificateGIA 3305996154
Side View
Table 62.0%CrownGirdle: STK-ETKPavilionCulet: NoneDepth 73.4%

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 28
Current: £1,537 GBP|Low: £734 GBP|High: £1,556 GBP|Avg: £1,091 GBP|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 1, 2026
Retailer 4£734 GBP
Retailer 2£957 GBP
Retailer 5£1,085 GBP
Retailer 3£1,176 GBP
MOH London£1,537 GBP

30 data points across 5 retailers

5 retailers£734 GBP to £1,537 GBP

B+
Cheapest Retailer
-
£734 GBP
$985 USD
B
Retailer 2
-
£957 GBP
View
Retailer 3
-
£1,085 GBP
A$2,240 AUD
View
Price last confirmed 34 days ago
B
Retailer 4
-
£1,176 GBP
€1,503 EUR
View
Most Expensive
B
MOH London
7134860C5 · Nov 1
£1,537 GBP
View
4 more retailers have this diamond
Prices start from £734 GBPSave up to £803 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+
0.66ct Cushion
£734 GBP