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Radiant|Lab Grown|IGI

6.78ct D VVS2 Radiant Lab Grown Diamond

ID • D/VVS2 • IGI LG842631327

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG842631327

Diamond specifications and retailer prices

From $4,087 AUD
$2,864 USD
As of November 1, 2026
Save $11,107 AUD (73%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $15,194 AUD at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 6.78ct lab-grown radiant diamond

This 6.78ct lab-grown radiant sits in the over five carat band, graded D colour (colourless) and VVS2 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG842631327 or 842631327. Listed at 16 retailers as of October 31, 2026, with prices from $4,087 to $15,194, a $11,107 spread on the same certified stone. Taylor and Hart lists it at $15,194. 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
VVS2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.1°
Pavilion angle34.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG842631327
Dimensions13.39 × 9.32 × 6.13 mm
L/W Ratio1.44
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
13.39 mm9.32 mm6.78 ctD / VVS2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG842631327
Side View
Table 68.0%Crown 42.1°Girdle: MED-STKPavilion 34.3°Culet: NoneDepth 65.8%

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: Nov 1
Current: $4,559 AUD|Low: $4,087 AUD|High: $15,632 AUD|Avg: $7,917 AUD|-3.3%
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
Taylor and Hart
November 3, 2026
Retailer 2$4,087 AUD
Retailer 5$4,207 AUD
Retailer 14$4,484 AUD
Retailer 1$4,559 AUD
Retailer 8$5,850 AUD
Retailer 13$6,190 AUD
Retailer 11$6,355 AUD
Retailer 12$7,641 AUD
Retailer 10$7,747 AUD
Retailer 3$8,072 AUD
Retailer 15$8,220 AUD
Retailer 6$8,480 AUD
Retailer 4$9,590 AUD
Retailer 7$11,136 AUD
Retailer 9$11,598 AUD
Taylor and Hart$15,194 AUD

25 data points across 16 retailers

16 retailers$4,087 AUD to $15,194 AUD

A
Cheapest Retailer
-
$4,087 AUD
$2,864 USD
A
Retailer 2
-
$4,207 AUD
$2,948 USD
View
Final sale: no returns
A
Retailer 3
-
$4,484 AUD
£2,474 GBP
View
A
Retailer 4
-
$4,559 AUD
$3,195 USD
View
B+
Retailer 5
-
$5,850 AUD
£3,228 GBP
View
B+
Retailer 6
-
$6,190 AUD
$4,338 USD
View
B+
Retailer 7
-
$6,355 AUD
$4,454 USD
View
B+
Retailer 8
-
$7,641 AUD
€5,100 EUR
View
B+
Retailer 9
-
$7,747 AUD
$5,429 USD
View
B+
Retailer 10
-
$8,072 AUD
View
B+
Retailer 11
-
$8,220 AUD
£4,536 GBP
View
B+
Retailer 12
-
$8,480 AUD
ZAR 96,012 ZAR
View
B
Retailer 13
-
$9,590 AUD
View
B
Retailer 14
-
$11,136 AUD
$7,804 USD
View
B
Retailer 15
-
$11,598 AUD
£6,400 GBP
View
Most Expensive
B
Taylor and Hart
HGM0G23 · Oct 31
$15,194 AUD
$10,648 USD
View
15 more retailers have this diamond
Prices start from $4,087 AUDSave up to $11,107 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 Radiant
$4,087 AUD