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Heart|Lab Grown|GIA

0.51ct D SI1 Heart Lab Grown Diamond

EX • D/SI1 • GIA 6551182341

Certificate GIA 6551182341

Diamond specifications and retailer prices

From HK$4,229 HKD
$539 USD
As of November 2, 2026
Save HK$2,845 HKD (40%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: HK$10,602 HKD at MOH London · As of October 26, 2026
View at MOH London

About this 0.51ct lab-grown heart diamond

This 0.51ct lab-grown heart sits in the half to three-quarter carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551182341. Listed at 10 retailers as of October 30, 2026, with a 67% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginLab Grown
Grading LabGIA
CertificateGIA 6551182341
Dimensions4.79 × 5.45 × 3.33 mm
L/W Ratio1.14
Top View
4.79 mm5.45 mm0.51 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6551182341
Side View
Table 59.0%CrownGirdlePavilionCulet: NDepth 61.0%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: HK$10,602 HKD|Low: HK$4,229 HKD|High: HK$24,651 HKD|Avg: HK$8,408 HKD|-57.0%
MOH London
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
November 1, 2026
Retailer 13HK$4,229 HKD
Retailer 12HK$4,362 HKD
Retailer 3HK$4,456 HKD
Retailer 14HK$4,998 HKD
Retailer 6HK$5,531 HKD
Retailer 15HK$5,531 HKD
Retailer 8HK$5,624 HKD
Retailer 2HK$5,626 HKD
Retailer 10HK$5,743 HKD
Retailer 11HK$6,080 HKD
Retailer 9HK$7,073 HKD
Retailer 7HK$7,485 HKD
Retailer 5HK$8,520 HKD
MOH LondonHK$10,602 HKD
Retailer 4HK$14,546 HKD

41 data points across 15 retailers

10 retailersHK$4,229 HKD to HK$7,073 HKD

B
Cheapest Retailer
-
HK$4,229 HKD
$539 USD
Final sale: no returns
B
Retailer 2
-
HK$4,362 HKD
$556 USD
View
Retailer 3
-
HK$5,531 HKD
$705 USD
View
Price last confirmed 20 days ago
B
Retailer 4
-
HK$5,624 HKD
£564 GBP
View
B
Retailer 5
-
HK$5,626 HKD
£565 GBP
View
B
Retailer 6
-
HK$5,743 HKD
£576 GBP
View
B
Retailer 7
-
HK$6,080 HKD
$775 USD
View
B
Retailer 8
-
HK$7,073 HKD
ZAR 14,565 ZAR
View
Retailer 9
-
HK$8,520 HKD
$1,086 USD
View
Price last confirmed 9 days ago
Most Expensive
MOH London
B2444F0CD · Oct 26
HK$10,602 HKD
£1,064 GBP
View
Price under review
9 more retailers have this diamond
Prices start from HK$4,229 HKDSave up to HK$2,845 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.

B
0.51ct Heart
HK$4,229 HKD