CaratHunter
Plans
Heart|Lab Grown|IGI

12.28ct E VS1 Heart Lab Grown Diamond

ID • E/VS1 • IGI LG659441285

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG659441285

Diamond specifications and retailer prices

From €4,173 EUR
$4,662 USD
As of October 29, 2026
Save €11,199 EUR (73%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €25,447 EUR at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 12.28ct lab-grown heart diamond

This 12.28ct lab-grown heart sits in the over five carat band, graded E colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG659441285 or 659441285. Listed at 15 retailers as of October 29, 2026, with a 268% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

12.28
Carat
E
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle39.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG659441285
Dimensions16.22 × 14.13 × 9.42 mm
L/W Ratio1.15
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.22 mm14.13 mm12.28 ctE / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG659441285
Side View
Table 56.0%Crown 36.1°Girdle: MED-STKPavilion 39.3°Culet: NoneDepth 58.1%

Caratlytics Score

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

Price History

Last verified: Oct 29
Current: €25,447 EUR|Low: €3,504 EUR|High: €25,447 EUR|Avg: €8,519 EUR
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
October 31, 2026
Retailer 12€3,512 EUR
Retailer 3€4,173 EUR
Retailer 5€4,322 EUR
Retailer 9€4,323 EUR
Retailer 14€4,453 EUR
Retailer 11€5,625 EUR
Retailer 2€5,640 EUR
Retailer 8€6,690 EUR
Retailer 15€6,691 EUR
Retailer 13€8,067 EUR
Retailer 10€8,160 EUR
Retailer 6€9,793 EUR
Retailer 4€12,007 EUR
Retailer 7€15,372 EUR
Brilliant Earth€25,447 EUR

18 data points across 15 retailers

15 retailers€4,173 EUR to €15,372 EUR

Retailer 1
-
€3,512 EUR
£3,089 GBP
Price last confirmed 19 days ago
A
Retailer 2
-
€4,173 EUR
$4,662 USD
View
Final sale: no returns
Retailer 3
-
€4,322 EUR
$4,829 USD
View
Price last confirmed 20 days ago
A
Retailer 4
-
€4,323 EUR
$4,830 USD
View
B+
Retailer 5
-
€4,453 EUR
$4,975 USD
View
B+
Retailer 6
-
€5,625 EUR
$6,284 USD
View
B+
Retailer 7
-
€5,640 EUR
£4,961 GBP
View
B+
Retailer 8
-
€6,690 EUR
ZAR 120,746 ZAR
View
B+
Retailer 9
-
€6,691 EUR
$7,475 USD
View
B
Retailer 10
-
€8,067 EUR
$9,012 USD
View
Retailer 11
-
€8,160 EUR
A$14,025 AUD
View
Price last confirmed 9 days ago
B
Retailer 12
-
€9,793 EUR
$10,941 USD
View
B
Retailer 13
-
€12,007 EUR
$13,414 USD
View
B
Retailer 14
-
€15,372 EUR
$17,173 USD
View
Most Expensive
Brilliant Earth
11953179A · Oct 30
€25,447 EUR
$28,430 USD
View
Price under review
14 more retailers have this diamond
Prices start from €4,173 EURSave up to €11,199 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
12.28ct Heart
€4,173 EUR