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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 $5,090 NZD
$2,864 USD
As of November 1, 2026
Save $13,835 NZD (73%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $18,925 NZD 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 $5,090 to $18,925, a $13,835 spread on the same certified stone. Taylor and Hart lists it at $18,925. 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: $14,574 NZD|Low: $5,090 NZD|High: $19,471 NZD|Avg: $9,864 NZD|+3.9%
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
Taylor and Hart
November 3, 2026
Retailer 3$5,090 NZD
Retailer 6$5,239 NZD
Retailer 15$5,585 NZD
Retailer 8$5,678 NZD
Retailer 9$7,286 NZD
Retailer 14$7,710 NZD
Retailer 12$7,916 NZD
Retailer 13$9,517 NZD
Retailer 11$9,649 NZD
Retailer 4$10,054 NZD
Retailer 2$10,239 NZD
Retailer 7$10,563 NZD
Retailer 5$11,945 NZD
Retailer 10$14,446 NZD
Retailer 1$14,574 NZD
Taylor and Hart$18,925 NZD

25 data points across 16 retailers

16 retailers$5,090 NZD to $18,925 NZD

A
Cheapest Retailer
-
$5,090 NZD
$2,864 USD
A
Retailer 2
-
$5,239 NZD
$2,948 USD
View
Final sale: no returns
A
Retailer 3
-
$5,585 NZD
£2,474 GBP
View
A
Retailer 4
-
$5,678 NZD
$3,195 USD
View
B+
Retailer 5
-
$7,286 NZD
£3,228 GBP
View
B+
Retailer 6
-
$7,710 NZD
$4,338 USD
View
B+
Retailer 7
-
$7,916 NZD
$4,454 USD
View
B+
Retailer 8
-
$9,517 NZD
€5,100 EUR
View
B+
Retailer 9
-
$9,649 NZD
$5,429 USD
View
B+
Retailer 10
-
$10,054 NZD
A$8,703 AUD
View
B+
Retailer 11
-
$10,239 NZD
£4,536 GBP
View
B+
Retailer 12
-
$10,563 NZD
ZAR 96,012 ZAR
View
B
Retailer 13
-
$11,945 NZD
A$10,340 AUD
View
B
Retailer 14
-
$14,446 NZD
£6,400 GBP
View
B
Retailer 15
-
$14,574 NZD
$8,200 USD
View
Most Expensive
B
Taylor and Hart
HGM0G23 · Oct 31
$18,925 NZD
$10,648 USD
View
15 more retailers have this diamond
Prices start from $5,090 NZDSave up to $13,835 NZD

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
$5,090 NZD