Radiant|Lab Grown|IGI

6.64ct D VVS2 Radiant Lab Grown Diamond

GD • D/VVS2

Diamond specifications and retailer prices

From £1,947 GBP
$2,609 USD
As of October 30, 2026
Save £1,175 GBP (38%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £7,960 GBP at Helzberg Diamonds · As of October 12, 2026
View at Helzberg Diamonds

About this 6.64ct lab-grown radiant diamond

This 6.64ct lab-grown radiant sits in the over five carat band, graded D colour (colourless) and VVS2 clarity (very-very-slightly-included), with a standard cut grade and certified by IGI. Listed at 10 retailers as of October 25, 2026, with a 60% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

6.64
Carat
D
Colour
VVS2
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions14.12 × 8.80 × 5.86 mm
L/W Ratio1.60
Top View
14.12 mm8.80 mm6.64 ctD / VVS2
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 66.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 66.6%

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: £7,960 GBP|Low: £1,947 GBP|High: £8,273 GBP|Avg: £3,683 GBP|-3.8%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 30, 2026
Retailer 3£1,947 GBP
Retailer 6£2,118 GBP
Retailer 4£2,258 GBP
Retailer 2£2,440 GBP
Retailer 5£3,104 GBP
Helzberg Diamonds£7,960 GBP

20 data points across 6 retailers

10 retailers£1,947 GBP to £3,122 GBP

B+
Cheapest Retailer
-
£1,947 GBP
$2,609 USD
Retailer 2
-
£1,970 GBP
$2,639 USD
View
Price last confirmed 7 days ago
B+
Retailer 3
-
£2,118 GBP
$2,838 USD
View
A
Retailer 4
-
£2,130 GBP
$2,854 USD
View
B+
Retailer 5
-
£2,258 GBP
$3,026 USD
View
B+
Retailer 6
-
£2,271 GBP
$3,043 USD
View
B+
Retailer 7
-
£2,440 GBP
$3,269 USD
View
B
Retailer 8
-
£3,104 GBP
$4,159 USD
View
B+
Retailer 9
-
£3,122 GBP
$4,183 USD
View
Most Expensive
Helzberg Diamonds
ZXZOKHMLGOPJ · Oct 12
£7,960 GBP
$10,665 USD
View
Price last confirmed 19 days ago
9 more retailers have this diamond
Prices start from £1,947 GBPSave up to £1,175 GBP

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
6.64ct Radiant
£1,947 GBP