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Cushion|Lab Grown|IGI

3.09ct F IF Cushion Lab Grown Diamond

EX • F/IF • IGI LG681589668

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG681589668

Diamond specifications and retailer prices

From €955 EUR
$1,067 USD
As of November 1, 2026
Save €4,290 EUR (82%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: €5,245 EUR at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 3.09ct lab-grown cushion diamond

This 3.09ct lab-grown cushion sits in the three to five carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG681589668 or 681589668. Listed at 19 retailers as of October 31, 2026, with prices from €955 to €5,245, a €4,290 spread on the same certified stone. Brilliant Earth lists it at €5,245. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.09
Carat
F
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.3°
Pavilion angle37.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG681589668
Dimensions8.41 × 8.41 × 5.41 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
8.41 mm8.41 mm3.09 ctF / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG681589668
Side View
Table 61.0%Crown 37.3°Girdle: MED-STKPavilion 37.7°Culet: NoneDepth 64.3%

Caratlytics Score

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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: €5,245 EUR|Low: €955 EUR|High: €5,254 EUR|Avg: €2,714 EUR|-0.2%
Brilliant Earth
Retailer 2
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Retailer 4
Retailer 5
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Retailer 8
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Retailer 11
Retailer 12
Retailer 13
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Retailer 18
November 2, 2026
Retailer 13€955 EUR
Retailer 10€1,130 EUR
Retailer 14€1,132 EUR
Retailer 8€1,488 EUR
Retailer 2€1,525 EUR
Retailer 12€1,573 EUR
Retailer 15€1,991 EUR
Retailer 11€2,234 EUR
Retailer 16€2,297 EUR
Retailer 6€2,540 EUR
Retailer 4€2,728 EUR
Retailer 3€2,745 EUR
Retailer 5€2,939 EUR
Retailer 18€3,218 EUR
Retailer 17€3,373 EUR
Retailer 7€3,443 EUR
Retailer 9€3,970 EUR
Brilliant Earth€5,245 EUR

35 data points across 18 retailers

19 retailers€955 EUR to €5,245 EUR

A
Cheapest Retailer
-
€955 EUR
$1,067 USD
Final sale: no returns
Retailer 2
-
€1,130 EUR
$1,263 USD
View
Price last confirmed 20 days ago
A
Retailer 3
-
€1,132 EUR
$1,265 USD
View
A
Retailer 4
-
€1,488 EUR
$1,662 USD
View
A
Retailer 5
-
€1,525 EUR
£1,341 GBP
View
A
Retailer 6
-
€1,573 EUR
View
Retailer 7
-
€1,695 EUR
£1,492 GBP
View
Price last confirmed 21 days ago
A
Retailer 8
-
€1,991 EUR
$2,224 USD
View
A
Retailer 9
-
€2,234 EUR
A$3,839 AUD
View
A
Retailer 10
-
€2,297 EUR
ZAR 41,451 ZAR
View
A
Retailer 11
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€2,540 EUR
$2,837 USD
View
A
Retailer 12
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€2,728 EUR
£2,400 GBP
View
A
Retailer 13
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€2,745 EUR
$3,067 USD
View
A
Retailer 14
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€2,939 EUR
$3,284 USD
View
B+
Retailer 15
-
€3,218 EUR
$3,595 USD
View
B+
Retailer 16
-
€3,373 EUR
£2,967 GBP
View
B+
Retailer 17
-
€3,443 EUR
$3,846 USD
View
B+
Retailer 18
-
€3,970 EUR
$4,435 USD
View
Most Expensive
B
Brilliant Earth
13438341A · Oct 31
€5,245 EUR
$5,860 USD
View
18 more retailers have this diamond
Prices start from €955 EURSave up to €4,290 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.

A
3.09ct Cushion
€955 EUR