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Heart|Lab Grown|IGI

4.51ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG816612944

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG816612944

Diamond specifications and retailer prices

From HK$53,149 HKD
As of November 4, 2026
Save HK$53,557 HKD (50%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: HK$106,706 HKD at Brilliant Earth · As of November 3, 2026
View at Brilliant Earth

About this 4.51ct lab-grown heart diamond

This 4.51ct lab-grown heart sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG816612944 or 816612944. Listed at 4 retailers as of November 3, 2026, with prices from HK$53,149 to HK$106,706, a HK$53,557 spread on the same certified stone. Brilliant Earth lists it at HK$106,706. 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

4.51
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle39.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816612944
Dimensions11.42 × 10.17 × 6.59 mm
L/W Ratio1.12
Girdle conditionFaceted
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
11.42 mm10.17 mm4.51 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816612944
Side View
Table 60.0%Crown 35.4°Girdle: MED-THKPavilion 39.3°Culet: NoneDepth 57.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: HK$106,706 HKD|Low: HK$42,706 HKD|High: HK$301,443 HKD|Avg: HK$106,738 HKD|-44.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 2, 2026
Retailer 6HK$42,745 HKD
Retailer 12HK$46,017 HKD
Retailer 10HK$46,095 HKD
Retailer 13HK$46,621 HKD
Retailer 2HK$53,149 HKD
Retailer 4HK$67,923 HKD
Retailer 7HK$70,959 HKD
Retailer 11HK$83,317 HKD
Retailer 8HK$104,375 HKD
Brilliant EarthHK$106,706 HKD
Retailer 3HK$138,458 HKD
Retailer 5HK$226,043 HKD
Retailer 9HK$272,335 HKD

11 data points across 13 retailers

4 retailersHK$53,149 HKD to HK$106,706 HKD

A
Cheapest Retailer
-
HK$53,149 HKD
Retailer 2
-
HK$70,959 HKD
View
Price last confirmed 24 days ago
Retailer 3
-
HK$104,375 HKD
View
Price last confirmed 24 days ago
Most Expensive
B+
Brilliant Earth
21730774Y · Nov 3
HK$106,706 HKD
$13,600 USD
View
3 more retailers have this diamond
Prices start from HK$53,149 HKDSave up to HK$53,557 HKD

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
4.51ct Heart
HK$53,149 HKD