Heart|Natural|GIA

1.51ct D SI1 Heart Natural Diamond

EX • D/SI1 • GIA 1555854809

Certificate GIA 1555854809

Diamond specifications and retailer prices

From $5,048 USD
As of November 6, 2026
Save $1,470 USD (23%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $6,518 USD at Blue Nile · As of November 5, 2026
View at Blue Nile

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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1555854809. Listed at 6 retailers as of November 5, 2026, with prices from $5,048 to $6,518, a $1,470 spread on the same certified stone. Blue Nile lists it at $6,518. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 1555854809
Dimensions6.80 × 7.97 × 4.77 mm
L/W Ratio1.17
Culet sizeNone
Key to symbols
Crystal, Feather, Indented Natural, Natural
Top View
6.80 mm7.97 mm1.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 1555854809
Side View
Table 57.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 59.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $6,518 USD|Low: $5,048 USD|High: $6,885 USD|Avg: $5,842 USD|-5.3%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 2$5,048 USD
Retailer 5$5,356 USD
Retailer 4$5,548 USD
Retailer 3$5,721 USD
Blue Nile$6,518 USD

46 data points across 5 retailers

6 retailers$5,048 USD to $6,518 USD

A
Cheapest Retailer
-
$5,048 USD
A
Retailer 2
-
$5,356 USD
View
A
Retailer 3
-
$5,548 USD
View
A
Retailer 4
-
$5,721 USD
View
B+
Retailer 5
-
$6,479 USD
View
Most Expensive
B+
Blue Nile
29780360 · Nov 5
$6,518 USD
View
5 more retailers have this diamond
Prices start from $5,048 USDSave up to $1,470 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
$5,048 USD