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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 $6,637 AUD
$4,662 USD
As of October 29, 2026
Save $17,811 AUD (73%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $40,473 AUD 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: $40,473 AUD|Low: $5,573 AUD|High: $40,473 AUD|Avg: $13,574 AUD
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 29, 2026
Retailer 12$5,586 AUD
Retailer 3$6,637 AUD
Retailer 5$6,875 AUD
Retailer 9$6,876 AUD
Retailer 14$7,082 AUD
Retailer 11$8,946 AUD
Retailer 8$9,044 AUD
Retailer 2$10,640 AUD
Retailer 15$10,641 AUD
Retailer 13$12,829 AUD
Retailer 10$12,978 AUD
Retailer 6$15,576 AUD
Retailer 4$19,097 AUD
Retailer 7$24,448 AUD
Brilliant Earth$40,473 AUD

17 data points across 15 retailers

15 retailers$6,637 AUD to $24,448 AUD

Retailer 1
-
$5,586 AUD
£3,089 GBP
Price last confirmed 18 days ago
A
Retailer 2
-
$6,637 AUD
$4,662 USD
View
Final sale: no returns
Retailer 3
-
$6,875 AUD
$4,829 USD
View
Price last confirmed 19 days ago
A
Retailer 4
-
$6,876 AUD
$4,830 USD
View
B+
Retailer 5
-
$7,082 AUD
$4,975 USD
View
B+
Retailer 6
-
$8,946 AUD
$6,284 USD
View
B+
Retailer 7
-
$9,044 AUD
£5,003 GBP
View
B+
Retailer 8
-
$10,640 AUD
ZAR 120,746 ZAR
View
B+
Retailer 9
-
$10,641 AUD
$7,475 USD
View
B
Retailer 10
-
$12,829 AUD
$9,012 USD
View
Retailer 11
-
$12,978 AUD
View
Price last confirmed 8 days ago
B
Retailer 12
-
$15,576 AUD
$10,941 USD
View
B
Retailer 13
-
$19,097 AUD
$13,414 USD
View
B
Retailer 14
-
$24,448 AUD
$17,173 USD
View
Most Expensive
Brilliant Earth
11953179A · Oct 30
$40,473 AUD
$28,430 USD
View
Price under review
14 more retailers have this diamond
Prices start from $6,637 AUDSave up to $17,811 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
12.28ct Heart
$6,637 AUD