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Cushion|Lab Grown|IGI

12.15ct F VS1 Cushion Lab Grown Diamond

ID • F/VS1 • IGI LG577377305

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG577377305

Diamond specifications and retailer prices

From €3,631 EUR
$4,073 USD
As of November 1, 2026
Save €16,902 EUR (82%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: €20,533 EUR at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 12.15ct lab-grown cushion diamond

This 12.15ct lab-grown cushion sits in the over five carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG577377305 or 577377305. Listed at 16 retailers as of November 1, 2026, with prices from €3,631 to €20,533, a €16,902 spread on the same certified stone. Brilliant Earth lists it at €20,533. 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

12.15
Carat
F
Color
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.4°
Pavilion angle34.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG577377305
Dimensions16.36 × 11.70 × 7.73 mm
L/W Ratio1.40
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
16.36 mm11.70 mm12.15 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG577377305
Side View
Table 64.0%Crown 40.4°Girdle: MED-THKPavilion 34.7°Culet: NoneDepth 66.1%

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: €20,533 EUR|Low: €3,631 EUR|High: €21,166 EUR|Avg: €6,916 EUR|-3.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 3, 2026
Retailer 6€3,631 EUR
Retailer 15€3,762 EUR
Retailer 8€3,901 EUR
Retailer 5€3,943 EUR
Retailer 9€4,810 EUR
Retailer 2€4,866 EUR
Retailer 14€5,768 EUR
Retailer 4€5,775 EUR
Retailer 3€5,833 EUR
Retailer 10€6,173 EUR
Retailer 7€6,755 EUR
Retailer 12€7,042 EUR
Retailer 11€8,894 EUR
Retailer 13€9,473 EUR
Brilliant Earth€20,533 EUR

30 data points across 15 retailers

16 retailers€3,631 EUR to €20,533 EUR

A
Cheapest Retailer
-
€3,631 EUR
$4,073 USD
Final sale: no returns
Retailer 2
-
€3,762 EUR
$4,219 USD
View
Price last confirmed 21 days ago
A
Retailer 3
-
€3,901 EUR
$4,375 USD
View
B+
Retailer 4
-
€4,810 EUR
$5,395 USD
View
A
Retailer 5
-
€4,866 EUR
£4,297 GBP
View
Retailer 6
-
€5,768 EUR
ZAR 104,511 ZAR
View
Price last confirmed 19 days ago
B+
Retailer 7
-
€5,775 EUR
£5,100 GBP
View
B+
Retailer 8
-
€5,833 EUR
$6,542 USD
View
B+
Retailer 9
-
€6,173 EUR
View
Retailer 10
-
€6,755 EUR
$7,576 USD
View
Price last confirmed 54 days ago
B+
Retailer 11
-
€7,042 EUR
A$12,152 AUD
View
B+
Retailer 12
-
€8,894 EUR
$9,976 USD
View
B
Retailer 13
-
€9,473 EUR
A$16,346 AUD
View
B
Retailer 14
-
€10,442 EUR
$11,712 USD
View
B
Retailer 15
-
€13,269 EUR
$14,882 USD
View
Most Expensive
B
Brilliant Earth
14103520A · Nov 2
€20,533 EUR
$23,030 USD
View
15 more retailers have this diamond
Prices start from €3,631 EURSave up to €16,902 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
12.15ct Cushion
€3,631 EUR