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Radiant|Lab Grown|IGI

20.30ct G VS1 Radiant Lab Grown Diamond

ID • G/VS1 • IGI LG813655566

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

Certificate IGI LG813655566

Diamond specifications and retailer prices

From $28,791 NZD
£12,755 GBP
As of November 2, 2026
Save $38,431 NZD (57%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $87,439 NZD at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 20.3ct lab-grown radiant diamond

This 20.3ct lab-grown radiant sits in the over five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG813655566 or 813655566. Listed at 16 retailers as of November 1, 2026, with a 133% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

20.30
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle31.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG813655566
Dimensions18.72 × 13.05 × 8.90 mm
L/W Ratio1.43
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
18.72 mm13.05 mm20.30 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG813655566
Side View
Table 67.0%Crown 34.9°Girdle: Slightly ThickPavilion 31.9°Culet: NoneDepth 68.2%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $39,594 NZD|Low: $15,724 NZD|High: $87,439 NZD|Avg: $39,590 NZD|+0.2%
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 7$23,700 NZD
Retailer 8$28,791 NZD
Retailer 4$30,905 NZD
Retailer 3$31,480 NZD
Retailer 9$31,647 NZD
Retailer 12$33,598 NZD
Retailer 14$33,706 NZD
Retailer 11$35,454 NZD
Retailer 2$35,832 NZD
Retailer 6$35,850 NZD
Retailer 1$39,594 NZD
Retailer 5$49,037 NZD
Retailer 15$49,837 NZD
Retailer 13$58,799 NZD
Retailer 10$67,223 NZD
Taylor and Hart$87,439 NZD

17 data points across 16 retailers

16 retailers$28,791 NZD to $67,223 NZD

Retailer 1
-
$23,700 NZD
$13,335 USD
Price last confirmed 12 days ago
B
Retailer 2
-
$28,791 NZD
£12,755 GBP
View
B
Retailer 3
-
$30,905 NZD
$17,389 USD
View
B
Retailer 4
-
$31,480 NZD
$17,712 USD
View
B
Retailer 5
-
$31,647 NZD
$17,806 USD
View
B
Retailer 6
-
$33,598 NZD
$18,904 USD
View
B
Retailer 7
-
$33,706 NZD
$18,965 USD
View
B
Retailer 8
-
$35,454 NZD
$19,948 USD
View
B
Retailer 9
-
$35,832 NZD
$20,161 USD
View
B
Retailer 10
-
$35,850 NZD
$20,171 USD
View
B
Retailer 11
-
$39,594 NZD
£17,542 GBP
View
B
Retailer 12
-
$49,037 NZD
$27,591 USD
View
Final sale: no returns
B
Retailer 13
-
$49,837 NZD
$28,041 USD
View
B
Retailer 14
-
$58,799 NZD
€31,508 EUR
View
B
Retailer 15
-
$67,223 NZD
A$58,189 AUD
View
Most Expensive
Taylor and Hart
YFN343Y · Oct 31
$87,439 NZD
$49,198 USD
View
Price under review
15 more retailers have this diamond
Prices start from $28,791 NZDSave up to $38,431 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.

B
20.30ct Radiant
$28,791 NZD