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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 $13,340 AUD
£7,362 GBP
As of November 2, 2026
Save $38,071 AUD (74%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $51,411 AUD 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 $13,340 to $51,411, a $38,071 spread on the same certified stone. Taylor and Hart lists it at $51,411. 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: $17,731 AUD|Low: $13,336 AUD|High: $51,411 AUD|Avg: $23,741 AUD|+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$13,340 AUD
Retailer 10$14,320 AUD
Retailer 12$14,893 AUD
Retailer 5$15,361 AUD
Retailer 3$15,567 AUD
Retailer 13$16,416 AUD
Retailer 4$16,611 AUD
Retailer 1$17,731 AUD
Retailer 9$17,899 AUD
Retailer 8$19,591 AUD
Retailer 7$31,420 AUD
Retailer 11$37,021 AUD
Retailer 2$47,516 AUD
Taylor and Hart$51,411 AUD

15 data points across 14 retailers

14 retailers$13,340 AUD to $51,411 AUD

A
Cheapest Retailer
-
$13,340 AUD
£7,362 GBP
A
Retailer 2
-
$14,320 AUD
$10,036 USD
View
B+
Retailer 3
-
$14,893 AUD
$10,437 USD
View
B+
Retailer 4
-
$15,361 AUD
$10,765 USD
View
B+
Retailer 5
-
$15,567 AUD
$10,910 USD
View
B+
Retailer 6
-
$16,416 AUD
$11,505 USD
View
B+
Retailer 7
-
$16,611 AUD
$11,641 USD
View
B+
Retailer 8
-
$17,731 AUD
$12,426 USD
View
B+
Retailer 9
-
$17,899 AUD
$12,544 USD
View
B+
Retailer 10
-
$19,591 AUD
£10,811 GBP
View
B
Retailer 11
-
$31,420 AUD
View
B
Retailer 12
-
$37,021 AUD
$25,945 USD
View
B
Retailer 13
-
$47,516 AUD
$33,300 USD
View
Most Expensive
B
Taylor and Hart
TGOWP9E · Oct 31
$51,411 AUD
$36,030 USD
View
13 more retailers have this diamond
Prices start from $13,340 AUDSave up to $38,071 AUD

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
$13,340 AUD