Heart|Natural|GIA

1.51ct D SI2 Heart Natural Diamond

EX • D/SI2 • GIA 6421555574

Certificate GIA 6421555574

Diamond specifications and retailer prices

From $7,075 USD
As of October 30, 2026
Save $8,115 USD (53%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $15,190 USD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6421555574. Listed at 9 retailers as of October 30, 2026, with prices from $7,075 to $15,190, a $8,115 spread on the same certified stone. NZ Jewellers lists it at $15,190. 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

1.51
Carat
D
Color
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6421555574
Dimensions7.22 × 7.86 × 4.32 mm
L/W Ratio1.09
Top View
7.22 mm7.86 mm1.51 ctD / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6421555574
Side View
Table 61.0%CrownGirdlePavilionCulet: NoneDepth 55.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $8,555 USD|Low: $7,075 USD|High: $12,809 USD|Avg: $9,490 USD|+0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 1, 2026
Retailer 4$7,075 USD
Retailer 5$8,354 USD
Retailer 1$8,555 USD
Retailer 6$9,494 USD
Retailer 2$9,925 USD
Retailer 3$12,724 USD

42 data points across 6 retailers

9 retailers$7,075 USD to $15,190 USD

B+
Cheapest Retailer
-
$7,075 USD
B+
Retailer 2
-
$8,228 USD
View
B+
Retailer 3
-
$8,354 USD
View
B+
Retailer 4
-
$8,555 USD
£6,736 GBP
View
B
Retailer 5
-
$9,281 USD
View
B
Retailer 6
-
$9,494 USD
View
B
Retailer 7
-
$9,925 USD
€9,452 EUR
View
B
Retailer 8
-
$12,724 USD
£10,019 GBP
View
Most Expensive
B
NZ Jewellers
52ea816d-be4c-430b-aec3-b2532433cb30 · Oct 30
$15,190 USD
View
8 more retailers have this diamond
Prices start from $7,075 USDSave up to $8,115 USD

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+
1.51ct Heart
$7,075 USD