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Heart|Natural|GIA

1.51ct G SI1 Heart Natural Diamond

EX • G/SI1 • GIA 6481518557

Certificate GIA 6481518557

Diamond specifications and retailer prices

From $12,007 NZD
As of November 4, 2026
Save $9,116 NZD (43%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $21,123 NZD at MOH London · As of November 4, 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 4, 2026, with prices from $12,007 to $21,123, a $9,116 spread on the same certified stone. MOH London lists it at $21,123. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $21,123 NZD|Low: $12,707 NZD|High: $21,407 NZD|Avg: $15,838 NZD|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 10$12,707 NZD
Retailer 3$12,708 NZD
Retailer 11$12,815 NZD
Retailer 2$14,206 NZD
Retailer 4$14,242 NZD
Retailer 9$14,572 NZD
Retailer 8$14,576 NZD
Retailer 5$16,511 NZD
Retailer 6$18,540 NZD
Retailer 7$20,985 NZD
MOH London$21,123 NZD

37 data points across 11 retailers

19 retailers$12,007 NZD to $21,123 NZD

B+
Cheapest Retailer
-
$12,007 NZD
B+
Retailer 2
-
$12,077 NZD
View
B+
Retailer 3
-
$12,707 NZD
View
Final sale: no returns
B+
Retailer 4
-
$12,708 NZD
View
Retailer 5
-
$12,708 NZD
View
Price last confirmed 30 days ago
B+
Retailer 6
-
$12,815 NZD
View
B+
Retailer 7
-
$13,535 NZD
View
B+
Retailer 8
-
$14,206 NZD
View
B+
Retailer 9
-
$14,242 NZD
View
B
Retailer 10
-
$14,572 NZD
View
Retailer 11
-
$14,576 NZD
View
Price last confirmed 16 days ago
B
Retailer 12
-
$14,612 NZD
View
B
Retailer 13
-
$14,612 NZD
View
B
Retailer 14
-
$15,099 NZD
View
B
Retailer 15
-
$15,299 NZD
View
B
Retailer 16
-
$16,511 NZD
View
B
Retailer 17
-
$18,540 NZD
View
Retailer 18
-
$20,985 NZD
View
Price last confirmed 10 days ago
Most Expensive
B
MOH London
7918798AC · Nov 4
$21,123 NZD
£9,220 GBP
View
18 more retailers have this diamond
Prices start from $12,007 NZDSave up to $9,116 NZD

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
$12,007 NZD