Heart|Natural|GIA

1.51ct G SI2 Heart Natural Diamond

EX • G/SI2 • GIA 7421670166

Certificate GIA 7421670166

Diamond specifications and retailer prices

From $5,444 USD
As of October 31, 2026
Save $2,199 USD (29%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $7,643 USD at 77 Diamonds · As of November 2, 2026
View at 77 Diamonds

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7421670166. Listed at 13 retailers as of October 31, 2026, with prices from $5,444 to $7,643, a $2,199 spread on the same certified stone. 77 Diamonds lists it at $7,643. 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
G
Color
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 7421670166
Dimensions6.71 × 7.98 × 4.75 mm
L/W Ratio1.19
Top View
6.71 mm7.98 mm1.51 ctG / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7421670166
Side View
Table 61.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 59.5%

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 31
Current: $7,643 USD|Low: $5,366 USD|High: $7,693 USD|Avg: $6,630 USD|+1.8%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
November 2, 2026
Retailer 4$5,444 USD
Retailer 3$6,392 USD
Retailer 2$7,029 USD
77 Diamonds$7,643 USD

39 data points across 4 retailers

13 retailers$5,444 USD to $7,643 USD

B+
Cheapest Retailer
-
$5,444 USD
B+
Retailer 2
-
$5,650 USD
View
B+
Retailer 3
-
$5,934 USD
A$9,130 AUD
View
B+
Retailer 4
-
$6,026 USD
View
B+
Retailer 5
-
$6,100 USD
View
B+
Retailer 6
-
$6,392 USD
View
B
Retailer 7
-
$6,830 USD
View
B
Retailer 8
-
$6,830 USD
View
B+
Retailer 9
-
$7,029 USD
View
Retailer 10
-
$7,029 USD
View
Price last confirmed 18 days ago
Retailer 11
-
$7,029 USD
View
Price last confirmed 11 days ago
B+
Retailer 12
-
$7,060 USD
View
Most Expensive
B
77 Diamonds
HSZCTZJ2TK3 · Nov 2
$7,643 USD
£6,018 GBP
View
12 more retailers have this diamond
Prices start from $5,444 USDSave up to $2,199 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
$5,444 USD