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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 $2,864 USD
As of November 1, 2026
Save $7,784 USD (73%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $10,648 USD 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 $2,864 to $10,648, a $7,784 spread on the same certified stone. Taylor and Hart lists it at $10,648. 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
Color
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

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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: $5,429 USD|Low: $2,864 USD|High: $10,955 USD|Avg: $5,557 USD|-2.4%
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 2, 2026
Retailer 14$2,864 USD
Retailer 4$2,948 USD
Retailer 11$3,142 USD
Retailer 3$3,215 USD
Retailer 12$4,090 USD
Retailer 10$4,338 USD
Retailer 8$4,454 USD
Retailer 9$5,355 USD
Retailer 1$5,429 USD
Retailer 15$5,657 USD
Retailer 13$5,761 USD
Retailer 5$5,943 USD
Retailer 2$6,721 USD
Retailer 7$7,804 USD
Retailer 6$8,266 USD
Taylor and Hart$10,648 USD

24 data points across 16 retailers

16 retailers$2,864 USD to $10,648 USD

A
Cheapest Retailer
-
$2,864 USD
A
Retailer 2
-
$2,948 USD
View
Final sale: no returns
A
Retailer 3
-
$3,142 USD
£2,474 GBP
View
A
Retailer 4
-
$3,215 USD
View
B+
Retailer 5
-
$4,090 USD
£3,220 GBP
View
B+
Retailer 6
-
$4,338 USD
View
B+
Retailer 7
-
$4,454 USD
View
B+
Retailer 8
-
$5,355 USD
€5,100 EUR
View
B+
Retailer 9
-
$5,429 USD
View
B+
Retailer 10
-
$5,657 USD
A$8,703 AUD
View
B+
Retailer 11
-
$5,761 USD
£4,536 GBP
View
B+
Retailer 12
-
$5,943 USD
ZAR 96,012 ZAR
View
B
Retailer 13
-
$6,721 USD
A$10,340 AUD
View
B
Retailer 14
-
$7,804 USD
View
B
Retailer 15
-
$8,266 USD
£6,509 GBP
View
Most Expensive
B
Taylor and Hart
HGM0G23 · Oct 31
$10,648 USD
View
15 more retailers have this diamond
Prices start from $2,864 USDSave up to $7,784 USD

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
$2,864 USD