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Heart|Lab Grown|IGI

18.86ct G VS1 Heart Lab Grown Diamond

ID • G/VS1 • IGI LG712589605

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG712589605

Diamond specifications and retailer prices

From $9,860 AUD
£5,441 GBP
As of November 2, 2026
Save $31,209 AUD (76%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $64,119 AUD at With Clarity · As of November 3, 2026
View at With Clarity

About this 18.86ct lab-grown heart diamond

This 18.86ct 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 LG712589605 or 712589605. Listed at 16 retailers as of October 31, 2026, with a 317% 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

18.86
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.1°
Pavilion angle37°
OriginLab Grown
Grading LabIGI
CertificateIGI LG712589605
Dimensions18.72 × 16.43 × 10.41 mm
L/W Ratio1.14
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
18.72 mm16.43 mm18.86 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG712589605
Side View
Table 58.0%Crown 37.1°Girdle: MED-STKPavilion 37°Culet: NoneDepth 55.6%

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: $14,973 AUD|Low: $9,860 AUD|High: $64,119 AUD|Avg: $22,773 AUD|-0.5%
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
Retailer 16
Retailer 17
Retailer 18
With Clarity
November 3, 2026
Retailer 11$9,860 AUD
Retailer 7$10,585 AUD
Retailer 5$11,007 AUD
Retailer 18$12,034 AUD
Retailer 17$12,200 AUD
Retailer 16$12,278 AUD
Retailer 2$12,895 AUD
Retailer 3$13,808 AUD
Retailer 14$13,881 AUD
Retailer 13$14,219 AUD
Retailer 8$14,661 AUD
Retailer 1$14,973 AUD
Retailer 15$19,006 AUD
Retailer 12$23,393 AUD
Retailer 4$30,783 AUD
Retailer 9$31,340 AUD
Retailer 6$41,069 AUD
Retailer 10$47,502 AUD
With Clarity$64,119 AUD

8 data points across 19 retailers

16 retailers$9,860 AUD to $41,069 AUD

A
Cheapest Retailer
-
$9,860 AUD
£5,441 GBP
A
Retailer 2
-
$10,585 AUD
$7,418 USD
View
A
Retailer 3
-
$11,007 AUD
$7,714 USD
View
A
Retailer 4
-
$12,034 AUD
$8,434 USD
View
A
Retailer 5
-
$12,200 AUD
$8,550 USD
View
A
Retailer 6
-
$12,278 AUD
$8,605 USD
View
A
Retailer 7
-
$12,895 AUD
HK$70,600 HKD
View
B+
Retailer 8
-
$13,808 AUD
$9,677 USD
View
B+
Retailer 9
-
$13,881 AUD
$9,728 USD
View
B+
Retailer 10
-
$14,219 AUD
$9,965 USD
View
B+
Retailer 11
-
$14,973 AUD
£8,263 GBP
View
B+
Retailer 12
-
$19,006 AUD
ZAR 215,179 ZAR
View
B
Retailer 13
-
$23,393 AUD
View
B
Retailer 14
-
$30,783 AUD
$21,573 USD
View
B
Retailer 15
-
$41,069 AUD
$28,782 USD
View
Most Expensive
With Clarity
712589605 · Nov 3
$64,119 AUD
$44,936 USD
View
Price under review
15 more retailers have this diamond
Prices start from $9,860 AUDSave up to $31,209 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
18.86ct Heart
$9,860 AUD