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Heart|Lab Grown|IGI

0.78ct D IF Heart Lab Grown Diamond

EX • D/IF • IGI LG708585978

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG708585978

Diamond specifications and retailer prices

From £1,028 GBP
As of November 4, 2026
Save £993 GBP (49%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £5,045 GBP at Zales · As of November 4, 2026
View at Zales

About this 0.78ct lab-grown heart diamond

This 0.78ct lab-grown heart sits in the just-under-one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG708585978 or 708585978. Listed at 18 retailers as of November 2, 2026, with a 97% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Flawless clarity in sub-one-carat stones is rarely visible to the naked eye over VS1, so you are paying a meaningful premium for grade rather than appearance.

The 4Cs

0.78
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG708585978
Dimensions6.27 × 5.61 × 3.81 mm
L/W Ratio1.12
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.27 mm5.61 mm0.78 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG708585978
Side View
Table 61.0%Crown 36.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 60.8%

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 4
Current: £4,657 GBP|Low: £741 GBP|High: £5,407 GBP|Avg: £2,822 GBP|-0.6%
Retailer 1
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Retailer 18
Zales
November 5, 2026
Retailer 10£1,028 GBP
Retailer 8£1,191 GBP
Retailer 11£1,277 GBP
Retailer 14£1,390 GBP
Retailer 15£1,429 GBP
Retailer 3£1,430 GBP
Retailer 17£1,482 GBP
Retailer 4£1,612 GBP
Retailer 6£1,889 GBP
Retailer 5£2,022 GBP
Retailer 12£3,065 GBP
Retailer 16£3,173 GBP
Retailer 7£4,090 GBP
Retailer 13£4,434 GBP
Retailer 18£4,452 GBP
Retailer 1£4,657 GBP
Retailer 2£5,045 GBP
Zales£5,045 GBP
Retailer 9£5,207 GBP

37 data points across 19 retailers

18 retailers£1,028 GBP to £2,022 GBP

B+
Cheapest Retailer
-
£1,028 GBP
Retailer 2
-
£1,191 GBP
View
Price last confirmed 28 days ago
B+
Retailer 3
-
£1,277 GBP
View
B
Retailer 4
-
£1,390 GBP
View
B
Retailer 5
-
£1,429 GBP
View
B
Retailer 6
-
£1,430 GBP
View
Final sale: no returns
B
Retailer 7
-
£1,482 GBP
View
B
Retailer 8
-
£1,612 GBP
View
B
Retailer 9
-
£1,889 GBP
View
B
Retailer 10
-
£2,022 GBP
View
Retailer 11
-
£3,065 GBP
View
Price under review
Retailer 12
-
£3,173 GBP
View
Price under review
Most Expensive
Zales
524692174 · Nov 4
£5,045 GBP
$6,810 USD
View
Price under review
12 more retailers have this diamond
Prices start from £1,028 GBPSave up to £993 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.

B+
0.78ct Heart
£1,028 GBP