Radiant|Lab Grown|IGI

6.78ct D VVS2 Radiant Lab Grown Diamond

ID • D/VVS2

Diamond specifications and retailer prices

From $2,617 USD
As of November 2, 2026
Save $12,333 USD (82%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $14,950 USD at With Clarity · As of November 2, 2026
View at With Clarity

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. Listed at 12 retailers as of November 2, 2026, with prices from $2,617 to $14,950, a $12,333 spread on the same certified stone. With Clarity lists it at $14,950. 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
OriginLab Grown
Grading LabIGI
Dimensions13.39 × 9.32 × 6.13 mm
L/W Ratio1.44
Top View
13.39 mm9.32 mm6.78 ctD / VVS2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 68.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 65.8%

Caratlytics Score

How it works →
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 2
Current: $2,617 USD|Low: $2,617 USD|High: $16,154 USD|Avg: $7,006 USD|-2.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
With Clarity
November 2, 2026
Retailer 1$2,617 USD
Retailer 6$2,881 USD
Retailer 3$3,053 USD
Retailer 5$3,299 USD
Retailer 4$4,197 USD
Retailer 7$4,687 USD
Retailer 2$10,179 USD
Retailer 8$10,925 USD
With Clarity$14,950 USD

24 data points across 9 retailers

12 retailers$2,617 USD to $14,950 USD

A
Cheapest Retailer
-
$2,617 USD
Retailer 2
-
$2,678 USD
View
Price last confirmed 10 days ago
A
Retailer 3
-
$2,881 USD
View
Retailer 4
-
$2,897 USD
View
Price last confirmed 9 days ago
A
Retailer 5
-
$3,053 USD
View
Retailer 6
-
$3,089 USD
View
Price last confirmed 7 days ago
A
Retailer 7
-
$3,299 USD
View
B+
Retailer 8
-
$4,197 USD
View
Retailer 9
-
$4,246 USD
View
Price last confirmed 8 days ago
B
Retailer 10
-
$10,179 USD
SGD 13,755 SGD
View
Retailer 11
-
$10,925 USD
View
Price last confirmed 20 days ago
Most Expensive
B
With Clarity
842631327 · Nov 2
$14,950 USD
View
11 more retailers have this diamond
Prices start from $2,617 USDSave up to $12,333 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
$2,617 USD