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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 $767 AUD
$539 USD
As of November 2, 2026
Save $516 AUD (40%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $1,924 AUD 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: $1,924 AUD|Low: $767 AUD|High: $4,473 AUD|Avg: $1,514 AUD|-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 2, 2026
Retailer 13$767 AUD
Retailer 12$792 AUD
Retailer 3$809 AUD
Retailer 14$907 AUD
Retailer 6$1,004 AUD
Retailer 15$1,004 AUD
Retailer 2$1,021 AUD
Retailer 8$1,021 AUD
Retailer 10$1,042 AUD
Retailer 11$1,103 AUD
Retailer 9$1,283 AUD
Retailer 7$1,358 AUD
Retailer 5$1,546 AUD
MOH London$1,924 AUD
Retailer 4$2,639 AUD

42 data points across 15 retailers

10 retailers$767 AUD to $1,283 AUD

B
Cheapest Retailer
-
$767 AUD
$539 USD
Final sale: no returns
B
Retailer 2
-
$792 AUD
$556 USD
View
Retailer 3
-
$1,004 AUD
$705 USD
View
Price last confirmed 20 days ago
B
Retailer 4
-
$1,021 AUD
£564 GBP
View
B
Retailer 5
-
$1,021 AUD
£565 GBP
View
B
Retailer 6
-
$1,042 AUD
£576 GBP
View
B
Retailer 7
-
$1,103 AUD
$775 USD
View
B
Retailer 8
-
$1,283 AUD
ZAR 14,565 ZAR
View
Retailer 9
-
$1,546 AUD
$1,086 USD
View
Price last confirmed 10 days ago
Most Expensive
MOH London
B2444F0CD · Oct 26
$1,924 AUD
£1,064 GBP
View
Price under review
9 more retailers have this diamond
Prices start from $767 AUDSave up to $516 AUD

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
$767 AUD