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Heart|Lab Grown|IGI

6.78ct D VVS1 Heart Lab Grown Diamond

ID • D/VVS1 • IGI LG838658328

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG838658328

Diamond specifications and retailer prices

From $4,228 AUD
$2,970 USD
As of October 30, 2026
Save $13,060 AUD (76%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $30,241 AUD at Novita Diamonds · As of October 8, 2026
View at Novita Diamonds

About this 6.78ct lab-grown heart diamond

This 6.78ct lab-grown heart sits in the over five carat band, graded D colour (colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG838658328 or 838658328. Listed at 21 retailers as of October 30, 2026, with a 309% 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

6.78
Carat
D
Colour
VVS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.3°
Pavilion angle38.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG838658328
Dimensions11.40 × 13.40 × 7.63 mm
L/W Ratio1.18
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.40 mm13.40 mm6.78 ctD / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG838658328
Side View
Table 66.0%Crown 41.3°Girdle: MED-STKPavilion 38.7°Culet: NoneDepth 56.9%

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 30
Current: $5,004 AUD|Low: $4,228 AUD|High: $24,419 AUD|Avg: $9,229 AUD|-2.9%
Retailer 1
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
Retailer 16
Retailer 17
Retailer 18
October 30, 2026
Retailer 10$4,228 AUD
Retailer 15$4,600 AUD
Retailer 5$4,735 AUD
Retailer 8$4,904 AUD
Retailer 1$5,004 AUD
Retailer 2$5,132 AUD
Retailer 17$5,195 AUD
Retailer 7$6,129 AUD
Retailer 11$6,628 AUD
Retailer 14$7,007 AUD
Retailer 18$7,047 AUD
Retailer 4$9,102 AUD
Retailer 12$9,491 AUD
Retailer 13$12,497 AUD
Retailer 6$17,074 AUD
Retailer 3$17,217 AUD
Retailer 9$17,288 AUD
Retailer 16$24,042 AUD

19 data points across 18 retailers

21 retailers$4,228 AUD to $17,288 AUD

A
Cheapest Retailer
-
$4,228 AUD
$2,970 USD
A
Retailer 2
-
$4,600 AUD
$3,231 USD
View
A
Retailer 3
-
$4,735 AUD
$3,326 USD
View
Final sale: no returns
B+
Retailer 4
-
$4,904 AUD
$3,445 USD
View
B+
Retailer 5
-
$5,004 AUD
£2,768 GBP
View
Retailer 6
-
$5,005 AUD
$3,516 USD
View
Price last confirmed 19 days ago
B+
Retailer 7
-
$5,132 AUD
$3,605 USD
View
B+
Retailer 8
-
$5,195 AUD
$3,649 USD
View
B+
Retailer 9
-
$6,129 AUD
$4,305 USD
View
B+
Retailer 10
-
$6,628 AUD
£3,666 GBP
View
B+
Retailer 11
-
$7,007 AUD
$4,922 USD
View
B+
Retailer 12
-
$7,047 AUD
$4,950 USD
View
Retailer 13
-
$9,102 AUD
View
Price last confirmed 9 days ago
B+
Retailer 14
-
$9,491 AUD
ZAR 107,702 ZAR
View
B
Retailer 15
-
$12,497 AUD
£6,912 GBP
View
B
Retailer 16
-
$12,637 AUD
$8,877 USD
View
B
Retailer 17
-
$17,074 AUD
$11,993 USD
View
B
Retailer 18
-
$17,217 AUD
$12,094 USD
View
B
Retailer 19
-
$17,288 AUD
SGD 16,411 SGD
View
Retailer 20
-
$24,042 AUD
$16,888 USD
View
Price under review
Most Expensive
Novita Diamonds
cert_838658328 · Oct 8
$30,241 AUD
View
Price under review
20 more retailers have this diamond
Prices start from $4,228 AUDSave up to $13,060 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
6.78ct Heart
$4,228 AUD