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Heart|Natural|GIA

0.51ct D SI1 Heart Natural Diamond

EX • D/SI1 • GIA 7536277818

Certificate GIA 7536277818

Diamond specifications and retailer prices

From $965 NZD
As of November 6, 2026
Save $332 NZD (26%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $1,297 NZD at 77 Diamonds · As of November 6, 2026
View at 77 Diamonds

About this 0.51ct natural heart diamond

This 0.51ct natural 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 7536277818. Listed at 4 retailers as of November 6, 2026, with prices from $965 to $1,297, a $332 spread on the same certified stone. 77 Diamonds lists it at $1,297. 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
OriginNatural
Grading LabGIA
CertificateGIA 7536277818
Dimensions4.98 × 5.75 × 3.16 mm
L/W Ratio1.15
Culet sizeNone
Key to symbols
Twinning Wisp, Feather
Top View
4.98 mm5.75 mm0.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 7536277818
Side View
Table 60.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 55.0%

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 6
Current: $1,297 NZD|Low: $833 NZD|High: $1,317 NZD|Avg: $1,072 NZD|+5.4%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 5$924 NZD
Retailer 2$965 NZD
Retailer 4$1,035 NZD
Retailer 3$1,173 NZD
77 Diamonds$1,297 NZD

35 data points across 5 retailers

4 retailers$965 NZD to $1,297 NZD

A
Cheapest Retailer
-
$965 NZD
Final sale: no returns
Retailer 2
-
$1,035 NZD
View
Price last confirmed 12 days ago
Retailer 3
-
$1,173 NZD
View
Price last confirmed 13 days ago
Most Expensive
B+
77 Diamonds
HSCPZHY4HKVJ · Nov 6
$1,297 NZD
£566 GBP
View
3 more retailers have this diamond
Prices start from $965 NZDSave up to $332 NZD

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
0.51ct Heart
$965 NZD