Heart|Natural|GIA

1.51ct G SI1 Heart Natural Diamond

EX • G/SI1 • GIA 6481518557

Certificate GIA 6481518557

Diamond specifications and retailer prices

From $6,656 USD
As of November 1, 2026
Save $5,085 USD (43%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $11,741 USD at MOH London · As of November 1, 2026
View at MOH London

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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6481518557. Listed at 19 retailers as of November 1, 2026, with prices from $6,656 to $11,741, a $5,085 spread on the same certified stone. MOH London lists it at $11,741. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6481518557
Dimensions7.15 × 6.78 × 4.48 mm
L/W Ratio1.05
Top View
7.15 mm6.78 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6481518557
Side View
Table 60.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 66.0%

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: Nov 1
Current: $11,741 USD|Low: $6,458 USD|High: $11,882 USD|Avg: $8,467 USD|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 2, 2026
Retailer 4$6,656 USD
Retailer 12$7,044 USD
Retailer 3$7,045 USD
Retailer 5$7,045 USD
Retailer 13$7,104 USD
Retailer 2$7,938 USD
Retailer 7$7,954 USD
Retailer 11$8,078 USD
Retailer 10$8,081 USD
Retailer 6$9,202 USD
Retailer 8$10,350 USD
Retailer 9$11,633 USD
MOH London$11,741 USD

34 data points across 13 retailers

19 retailers$6,656 USD to $11,741 USD

B+
Cheapest Retailer
-
$6,656 USD
B+
Retailer 2
-
$6,695 USD
View
B+
Retailer 3
-
$7,044 USD
View
Final sale: no returns
B+
Retailer 4
-
$7,045 USD
View
Retailer 5
-
$7,045 USD
View
Price last confirmed 25 days ago
B+
Retailer 6
-
$7,104 USD
View
B+
Retailer 7
-
$7,503 USD
View
B+
Retailer 8
-
$7,938 USD
£6,250 GBP
View
B+
Retailer 9
-
$7,954 USD
£6,263 GBP
View
B
Retailer 10
-
$8,078 USD
View
Retailer 11
-
$8,081 USD
A$12,432 AUD
View
Price last confirmed 11 days ago
B
Retailer 12
-
$8,100 USD
View
B
Retailer 13
-
$8,100 USD
View
B
Retailer 14
-
$8,370 USD
View
B
Retailer 15
-
$8,481 USD
View
B
Retailer 16
-
$9,202 USD
€8,764 EUR
View
B
Retailer 17
-
$10,350 USD
ZAR 167,201 ZAR
View
B
Retailer 18
-
$11,633 USD
£9,160 GBP
View
Most Expensive
B
MOH London
7918798AC · Nov 1
$11,741 USD
£9,245 GBP
View
18 more retailers have this diamond
Prices start from $6,656 USDSave up to $5,085 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
$6,656 USD