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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 €878 EUR
$985 USD
As of October 28, 2026
Save €961 EUR (52%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: €1,839 EUR 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 €878 to €1,839, a €961 spread on the same certified stone. MOH London lists it at €1,839. 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
Color
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: €1,839 EUR|Low: €878 EUR|High: €1,862 EUR|Avg: €1,302 EUR|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 1, 2026
Retailer 4€878 EUR
Retailer 2€1,145 EUR
Retailer 5€1,298 EUR
Retailer 3€1,407 EUR
MOH London€1,839 EUR

31 data points across 5 retailers

5 retailers€878 EUR to €1,839 EUR

B+
Cheapest Retailer
-
€878 EUR
$985 USD
B
Retailer 2
-
€1,145 EUR
£1,011 GBP
View
Retailer 3
-
€1,298 EUR
A$2,240 AUD
View
Price last confirmed 34 days ago
B
Retailer 4
-
€1,407 EUR
View
Most Expensive
B
MOH London
7134860C5 · Nov 1
€1,839 EUR
£1,624 GBP
View
4 more retailers have this diamond
Prices start from €878 EURSave up to €961 EUR

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
€878 EUR