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Heart|Natural|GIA

1.51ct K SI2 Heart Natural Diamond

EX • K/SI2 • GIA 6565678111

Certificate GIA 6565678111

Diamond specifications and retailer prices

From $2,178 USD
As of November 5, 2026
Save $1,755 USD (45%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $3,933 USD at Wholesale Diamonds Direct · As of November 6, 2026
View at Wholesale Diamonds Direct

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6565678111. Listed at 8 retailers as of November 5, 2026, with prices from $2,178 to $3,933, a $1,755 spread on the same certified stone. Wholesale Diamonds Direct lists it at $3,933. 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
K
Color
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35.47°
Pavilion angle38.33°
OriginNatural
Grading LabGIA
CertificateGIA 6565678111
Dimensions7.81 × 6.95 × 4.66 mm
L/W Ratio1.12
Culet sizeNone
Top View
7.81 mm6.95 mm1.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6565678111
Side View
Table 57.0%Crown 35.47°Girdle: STK-VTKPavilion 38.33°Culet: NDepth 59.6%

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 5
Current: $2,518 USD|Low: $2,175 USD|High: $3,933 USD|Avg: $2,680 USD|+1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Wholesale Diamonds Direct
November 6, 2026
Retailer 2$2,178 USD
Retailer 7$2,241 USD
Retailer 3$2,313 USD
Retailer 4$2,353 USD
Retailer 1$2,518 USD
Retailer 6$2,562 USD
Retailer 5$2,773 USD
Wholesale Diamonds Direct$3,933 USD

16 data points across 8 retailers

8 retailers$2,178 USD to $3,933 USD

A
Cheapest Retailer
-
$2,178 USD
A
Retailer 2
-
$2,241 USD
View
A
Retailer 3
-
$2,313 USD
View
A
Retailer 4
-
$2,353 USD
View
A
Retailer 5
-
$2,518 USD
View
A
Retailer 6
-
$2,562 USD
View
B+
Retailer 7
-
$2,773 USD
View
Most Expensive
B+
Wholesale Diamonds Direct
585254021 · Nov 6
$3,933 USD
View
7 more retailers have this diamond
Prices start from $2,178 USDSave up to $1,755 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.

A
1.51ct Heart
$2,178 USD