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Heart|Lab Grown|IGI

12.80ct G VS1 Heart Lab Grown Diamond

ID • G/VS1 • IGI LG617449446

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG617449446

Diamond specifications and retailer prices

From £3,930 GBP
As of November 2, 2026
Save £13,307 GBP (77%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £17,237 GBP at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 12.8ct lab-grown heart diamond

This 12.8ct 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 LG617449446 or 617449446. Listed at 21 retailers as of October 31, 2026, with prices from £3,930 to £17,237, a £13,307 spread on the same certified stone. Taylor and Hart lists it at £17,237. 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

12.80
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.1°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG617449446
Dimensions15.99 × 14.40 × 9.42 mm
L/W Ratio1.11
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
15.99 mm14.40 mm12.80 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG617449446
Side View
Table 59.0%Crown 37.1°Girdle: MED-THKPavilion 39.9°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: £6,224 GBP|Low: £3,929 GBP|High: £12,427 GBP|Avg: £6,312 GBP|-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
November 3, 2026
Retailer 12£3,930 GBP
Retailer 4£4,219 GBP
Retailer 2£4,421 GBP
Retailer 9£4,724 GBP
Retailer 8£4,782 GBP
Retailer 7£4,894 GBP
Retailer 15£4,894 GBP
Retailer 5£4,896 GBP
Retailer 10£5,602 GBP
Retailer 16£5,809 GBP
Retailer 1£6,224 GBP
Retailer 6£7,555 GBP
Retailer 14£7,575 GBP
Retailer 17£7,979 GBP
Retailer 11£8,029 GBP
Retailer 3£9,244 GBP
Retailer 13£9,336 GBP

39 data points across 17 retailers

21 retailers£3,930 GBP to £17,237 GBP

A
Cheapest Retailer
-
£3,930 GBP
A
Retailer 2
-
£4,219 GBP
$5,661 USD
View
A
Retailer 3
-
£4,421 GBP
$5,933 USD
View
B+
Retailer 4
-
£4,724 GBP
$6,339 USD
View
Final sale: no returns
B+
Retailer 5
-
£4,782 GBP
$6,417 USD
View
Retailer 6
-
£4,894 GBP
$6,567 USD
View
Price last confirmed 21 days ago
B+
Retailer 7
-
£4,894 GBP
$6,567 USD
View
A
Retailer 8
-
£4,896 GBP
$6,570 USD
View
B+
Retailer 9
-
£5,602 GBP
$7,517 USD
View
B+
Retailer 10
-
£5,809 GBP
$7,795 USD
View
B+
Retailer 11
-
£6,224 GBP
View
Retailer 12
-
£6,250 GBP
$8,387 USD
View
Price last confirmed 20 days ago
B
Retailer 13
-
£7,555 GBP
$10,139 USD
View
B+
Retailer 14
-
£7,575 GBP
ZAR 164,211 ZAR
View
B
Retailer 15
-
£7,979 GBP
$10,708 USD
View
B
Retailer 16
-
£8,029 GBP
€10,261 EUR
View
B
Retailer 17
-
£9,244 GBP
$12,405 USD
View
B
Retailer 18
-
£9,336 GBP
A$19,274 AUD
View
B
Retailer 19
-
£11,775 GBP
$15,802 USD
View
B
Retailer 20
-
£13,612 GBP
$18,266 USD
View
Most Expensive
B
Taylor and Hart
8BL32P5 · Oct 31
£17,237 GBP
$23,131 USD
View
20 more retailers have this diamond
Prices start from £3,930 GBPSave up to £13,307 GBP

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
12.80ct Heart
£3,930 GBP