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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 $12,287 NZD
£5,441 GBP
As of November 2, 2026
Save $38,888 NZD (76%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $79,896 NZD 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: $23,756 NZD|Low: $12,287 NZD|High: $79,896 NZD|Avg: $28,378 NZD|+0.3%
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 12$12,287 NZD
Retailer 7$13,189 NZD
Retailer 5$13,715 NZD
Retailer 18$14,996 NZD
Retailer 17$15,202 NZD
Retailer 16$15,300 NZD
Retailer 2$16,067 NZD
Retailer 3$17,206 NZD
Retailer 15$17,296 NZD
Retailer 14$17,718 NZD
Retailer 8$18,269 NZD
Retailer 11$18,657 NZD
Retailer 1$23,756 NZD
Retailer 13$29,149 NZD
Retailer 4$38,357 NZD
Retailer 9$39,052 NZD
Retailer 6$51,175 NZD
Retailer 10$59,190 NZD
With Clarity$79,896 NZD

8 data points across 19 retailers

16 retailers$12,287 NZD to $51,175 NZD

A
Cheapest Retailer
-
$12,287 NZD
£5,441 GBP
A
Retailer 2
-
$13,189 NZD
$7,418 USD
View
A
Retailer 3
-
$13,715 NZD
$7,714 USD
View
A
Retailer 4
-
$14,996 NZD
$8,434 USD
View
A
Retailer 5
-
$15,202 NZD
$8,550 USD
View
A
Retailer 6
-
$15,300 NZD
$8,605 USD
View
A
Retailer 7
-
$16,067 NZD
HK$70,600 HKD
View
B+
Retailer 8
-
$17,206 NZD
$9,677 USD
View
B+
Retailer 9
-
$17,296 NZD
$9,728 USD
View
B+
Retailer 10
-
$17,718 NZD
$9,965 USD
View
B+
Retailer 11
-
$18,657 NZD
£8,263 GBP
View
B+
Retailer 12
-
$23,756 NZD
ZAR 215,845 ZAR
View
B
Retailer 13
-
$29,149 NZD
A$25,222 AUD
View
B
Retailer 14
-
$38,357 NZD
$21,573 USD
View
B
Retailer 15
-
$51,175 NZD
$28,782 USD
View
Most Expensive
With Clarity
712589605 · Nov 3
$79,896 NZD
$44,936 USD
View
Price under review
15 more retailers have this diamond
Prices start from $12,287 NZDSave up to $38,888 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
18.86ct Heart
$12,287 NZD