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Heart|Lab Grown|IGI

20.51ct G VS1 Heart Lab Grown Diamond

VG • G/VS1 • IGI LG720595533

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG720595533

Diamond specifications and retailer prices

From $16,857 AUD
$11,814 USD
As of November 2, 2026
Save $40,234 AUD (70%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $57,091 AUD at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 20.51ct lab-grown heart diamond

This 20.51ct lab-grown heart sits in the over five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG720595533 or 720595533. Listed at 14 retailers as of October 31, 2026, with prices from $16,857 to $57,091, a $40,234 spread on the same certified stone. Taylor and Hart lists it at $57,091. 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

20.51
Carat
G
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.8°
Pavilion angle38.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG720595533
Dimensions16.59 × 17.88 × 10.68 mm
L/W Ratio1.08
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.59 mm17.88 mm20.51 ctG / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG720595533
Side View
Table 66.0%Crown 41.8°Girdle: VTK-ETKPavilion 38.5°Culet: NoneDepth 59.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $36,876 AUD|Low: $16,184 AUD|High: $57,091 AUD|Avg: $25,194 AUD|-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
Taylor and Hart
November 1, 2026
Retailer 10$16,857 AUD
Retailer 14$17,532 AUD
Retailer 3$17,819 AUD
Retailer 13$18,327 AUD
Retailer 4$18,879 AUD
Retailer 7$19,277 AUD
Retailer 2$19,556 AUD
Retailer 11$19,556 AUD
Retailer 9$20,749 AUD
Retailer 12$20,854 AUD
Retailer 6$22,645 AUD
Retailer 8$23,579 AUD
Retailer 1$36,876 AUD
Retailer 5$37,907 AUD
Taylor and Hart$57,091 AUD

16 data points across 15 retailers

14 retailers$16,857 AUD to $57,091 AUD

B+
Cheapest Retailer
-
$16,857 AUD
$11,814 USD
B+
Retailer 2
-
$17,532 AUD
$12,287 USD
View
B+
Retailer 3
-
$17,819 AUD
$12,488 USD
View
B+
Retailer 4
-
$18,327 AUD
$12,844 USD
View
B+
Retailer 5
-
$18,879 AUD
$13,231 USD
View
Final sale: no returns
B
Retailer 6
-
$19,277 AUD
$13,510 USD
View
B+
Retailer 7
-
$19,556 AUD
$13,705 USD
View
Retailer 8
-
$19,556 AUD
$13,705 USD
View
Price last confirmed 21 days ago
B
Retailer 9
-
$20,749 AUD
$14,541 USD
View
B
Retailer 10
-
$20,854 AUD
$14,615 USD
View
Retailer 11
-
$23,579 AUD
£13,011 GBP
View
Price last confirmed 14 days ago
B
Retailer 12
-
$36,876 AUD
View
B
Retailer 13
-
$37,907 AUD
$26,566 USD
View
Most Expensive
B
Taylor and Hart
GW5JPQB · Oct 31
$57,091 AUD
$40,011 USD
View
13 more retailers have this diamond
Prices start from $16,857 AUDSave up to $40,234 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.

B+
20.51ct Heart
$16,857 AUD