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Heart|Lab Grown|IGI

20.50ct G VS1 Heart Lab Grown Diamond

ID • G/VS1 • IGI LG843673757

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG843673757

Diamond specifications and retailer prices

From $16,623 NZD
£7,362 GBP
As of November 2, 2026
Save $47,438 NZD (74%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $64,061 NZD at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 20.5ct lab-grown heart diamond

This 20.5ct lab-grown heart 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 LG843673757 or 843673757. Listed at 14 retailers as of October 31, 2026, with prices from $16,623 to $64,061, a $47,438 spread on the same certified stone. Taylor and Hart lists it at $64,061. 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

20.50
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle38.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG843673757
Dimensions16.79 × 18.97 × 11.17 mm
L/W Ratio1.13
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.79 mm18.97 mm20.50 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG843673757
Side View
Table 55.0%Crown 34.9°Girdle: MED-STKPavilion 38.6°Culet: NoneDepth 58.9%

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 2
Current: $22,093 NZD|Low: $16,618 NZD|High: $64,061 NZD|Avg: $29,583 NZD|+8.1%
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
Taylor and Hart
November 2, 2026
Retailer 6$16,623 NZD
Retailer 10$17,844 NZD
Retailer 12$18,557 NZD
Retailer 5$19,140 NZD
Retailer 3$19,398 NZD
Retailer 13$20,456 NZD
Retailer 4$20,698 NZD
Retailer 1$22,093 NZD
Retailer 9$22,303 NZD
Retailer 8$24,412 NZD
Retailer 7$39,152 NZD
Retailer 11$46,130 NZD
Retailer 2$59,207 NZD
Taylor and Hart$64,061 NZD

15 data points across 14 retailers

14 retailers$16,623 NZD to $64,061 NZD

A
Cheapest Retailer
-
$16,623 NZD
£7,362 GBP
A
Retailer 2
-
$17,844 NZD
$10,036 USD
View
B+
Retailer 3
-
$18,557 NZD
$10,437 USD
View
B+
Retailer 4
-
$19,140 NZD
$10,765 USD
View
B+
Retailer 5
-
$19,398 NZD
$10,910 USD
View
B+
Retailer 6
-
$20,456 NZD
$11,505 USD
View
B+
Retailer 7
-
$20,698 NZD
$11,641 USD
View
B+
Retailer 8
-
$22,093 NZD
$12,426 USD
View
B+
Retailer 9
-
$22,303 NZD
$12,544 USD
View
B+
Retailer 10
-
$24,412 NZD
£10,811 GBP
View
B
Retailer 11
-
$39,152 NZD
A$33,877 AUD
View
B
Retailer 12
-
$46,130 NZD
$25,945 USD
View
B
Retailer 13
-
$59,207 NZD
$33,300 USD
View
Most Expensive
B
Taylor and Hart
TGOWP9E · Oct 31
$64,061 NZD
$36,030 USD
View
13 more retailers have this diamond
Prices start from $16,623 NZDSave up to $47,438 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
20.50ct Heart
$16,623 NZD