CaratHunter
Plans
Heart|Natural|GIA

1.51ct D SI2 Heart Natural Diamond

EX • D/SI2 • GIA 6421555574

Certificate GIA 6421555574

Diamond specifications and retailer prices

From $12,553 NZD
$7,075 USD
As of November 1, 2026
Save $14,398 NZD (53%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $26,952 NZD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6421555574. Listed at 9 retailers as of October 30, 2026, with prices from $12,553 to $26,952, a $14,398 spread on the same certified stone. NZ Jewellers lists it at $26,952. 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
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6421555574
Dimensions7.22 × 7.86 × 4.32 mm
L/W Ratio1.09
Top View
7.22 mm7.86 mm1.51 ctD / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6421555574
Side View
Table 61.0%CrownGirdlePavilionCulet: NoneDepth 55.0%

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 1
Current: $17,604 NZD|Low: $12,553 NZD|High: $22,727 NZD|Avg: $16,838 NZD|+2.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 4$12,553 NZD
Retailer 5$14,823 NZD
Retailer 2$15,179 NZD
Retailer 6$16,845 NZD
Retailer 1$17,604 NZD
Retailer 3$22,457 NZD

42 data points across 6 retailers

9 retailers$12,553 NZD to $26,952 NZD

B+
Cheapest Retailer
-
$12,553 NZD
$7,075 USD
B+
Retailer 2
-
$14,599 NZD
$8,228 USD
View
B+
Retailer 3
-
$14,823 NZD
$8,354 USD
View
B+
Retailer 4
-
$15,179 NZD
£6,736 GBP
View
B
Retailer 5
-
$16,467 NZD
$9,281 USD
View
B
Retailer 6
-
$16,845 NZD
$9,494 USD
View
B
Retailer 7
-
$17,604 NZD
€9,449 EUR
View
B
Retailer 8
-
$22,457 NZD
£9,966 GBP
View
Most Expensive
B
NZ Jewellers
52ea816d-be4c-430b-aec3-b2532433cb30 · Oct 30
$26,952 NZD
$15,190 USD
View
8 more retailers have this diamond
Prices start from $12,553 NZDSave up to $14,398 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
$12,553 NZD