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Cushion|Lab Grown|GIA

3.66ct F SI1 Cushion Lab Grown Diamond

EX • F/SI1 • GIA 1515119937

Certificate GIA 1515119937

Diamond specifications and retailer prices

From $1,959 AUD
$1,373 USD
As of November 1, 2026
Save $5,986 AUD (75%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $7,946 AUD at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 3.66ct lab-grown cushion diamond

This 3.66ct lab-grown cushion sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1515119937. Listed at 11 retailers as of October 31, 2026, with prices from $1,959 to $7,946, a $5,986 spread on the same certified stone. Taylor and Hart lists it at $7,946. 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

3.66
Carat
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabGIA
CertificateGIA 1515119937
Dimensions9.72 × 8.31 × 5.60 mm
L/W Ratio1.17
Girdle conditionFaceted
Cert comments
This is a man-made diamond produced by CVD (Chemical Vapor Deposition) growth process and has evidence of post-growth treatments to change the color.
Key to symbols
Growth Remnant
Top View
9.72 mm8.31 mm3.66 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1515119937
Side View
Table 63.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 67.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $3,319 AUD|Low: $1,959 AUD|High: $7,946 AUD|Avg: $3,571 AUD|+0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Taylor and Hart
November 2, 2026
Retailer 10$1,959 AUD
Retailer 9$2,068 AUD
Retailer 8$2,276 AUD
Retailer 2$2,426 AUD
Retailer 6$2,612 AUD
Retailer 3$2,933 AUD
Retailer 4$3,124 AUD
Retailer 1$3,319 AUD
Retailer 7$5,576 AUD
Retailer 5$7,200 AUD
Taylor and Hart$7,946 AUD

14 data points across 11 retailers

11 retailers$1,959 AUD to $7,946 AUD

A
Cheapest Retailer
-
$1,959 AUD
$1,373 USD
Final sale: no returns
A
Retailer 2
-
$2,068 AUD
$1,449 USD
View
B+
Retailer 3
-
$2,276 AUD
$1,595 USD
View
Retailer 4
-
$2,426 AUD
$1,700 USD
View
Price last confirmed 14 days ago
B+
Retailer 5
-
$2,612 AUD
HK$14,300 HKD
View
B+
Retailer 6
-
$2,933 AUD
£1,618 GBP
View
B+
Retailer 7
-
$3,124 AUD
£1,724 GBP
View
B+
Retailer 8
-
$3,319 AUD
€2,215 EUR
View
B
Retailer 9
-
$5,576 AUD
$3,908 USD
View
B
Retailer 10
-
$7,200 AUD
£3,973 GBP
View
Most Expensive
B
Taylor and Hart
OADXSED · Oct 31
$7,946 AUD
$5,568 USD
View
10 more retailers have this diamond
Prices start from $1,959 AUDSave up to $5,986 AUD

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
3.66ct Cushion
$1,959 AUD