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Heart|Natural|GIA

1.23ct D SI1 Heart Natural Diamond

VG • D/SI1 • GIA 6421591328

Certificate GIA 6421591328

Diamond specifications and retailer prices

From $7,042 NZD
As of November 6, 2026
Save $8,366 NZD (54%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $15,409 NZD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.23ct natural heart diamond

This 1.23ct natural heart sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6421591328. Listed at 13 retailers as of November 5, 2026, with prices from $7,042 to $15,409, a $8,366 spread on the same certified stone. NZ Jewellers lists it at $15,409. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.23
Carat
D
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6421591328
Dimensions7.28 × 6.27 × 3.74 mm
L/W Ratio1.16
Top View
7.28 mm6.27 mm1.23 ctD / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6421591328
Side View
Table 59.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 59.6%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $15,409 NZD|Low: $6,402 NZD|High: $15,409 NZD|Avg: $10,078 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 8$7,042 NZD
Retailer 2$8,787 NZD
Retailer 9$8,845 NZD
Retailer 10$8,845 NZD
Retailer 11$8,845 NZD
Retailer 6$8,848 NZD
Retailer 7$8,915 NZD
Retailer 3$10,205 NZD
Retailer 4$10,791 NZD
Retailer 5$13,710 NZD
NZ Jewellers$15,409 NZD

44 data points across 11 retailers

13 retailers$7,042 NZD to $15,409 NZD

B
Cheapest Retailer
-
$7,042 NZD
Final sale: no returns
B
Retailer 2
-
$8,787 NZD
View
Retailer 3
-
$8,845 NZD
View
Price last confirmed 8 days ago
B
Retailer 4
-
$8,845 NZD
View
B
Retailer 5
-
$8,845 NZD
View
B
Retailer 6
-
$8,848 NZD
View
Retailer 7
-
$8,915 NZD
View
Price last confirmed 28 days ago
B
Retailer 8
-
$8,965 NZD
View
B
Retailer 9
-
$9,117 NZD
View
B
Retailer 10
-
$10,205 NZD
View
B
Retailer 11
-
$10,791 NZD
View
B
Retailer 12
-
$13,710 NZD
View
Most Expensive
B
NZ Jewellers
8df258f0-f6e5-44b8-aada-89b0f87417ad · Nov 5
$15,409 NZD
$8,542 USD
View
12 more retailers have this diamond
Prices start from $7,042 NZDSave up to $8,366 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
1.23ct Heart
$7,042 NZD