Heart|Natural|GIA

1.23ct D SI1 Heart Natural Diamond

VG • D/SI1 • GIA 6421591328

Certificate GIA 6421591328

Diamond specifications and retailer prices

From $3,904 USD
As of November 4, 2026
Save $4,638 USD (54%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $8,542 USD 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 4, 2026, with prices from $3,904 to $8,542, a $4,638 spread on the same certified stone. NZ Jewellers lists it at $8,542. 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
Color
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 4
Current: $8,542 USD|Low: $3,549 USD|High: $8,542 USD|Avg: $5,587 USD
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$3,904 USD
Retailer 2$4,871 USD
Retailer 9$4,903 USD
Retailer 10$4,903 USD
Retailer 11$4,903 USD
Retailer 6$4,905 USD
Retailer 7$4,942 USD
Retailer 3$5,657 USD
Retailer 4$5,982 USD
Retailer 5$7,600 USD
NZ Jewellers$8,542 USD

44 data points across 11 retailers

13 retailers$3,904 USD to $8,542 USD

B
Cheapest Retailer
-
$3,904 USD
Final sale: no returns
B
Retailer 2
-
$4,871 USD
View
Retailer 3
-
$4,903 USD
View
Price last confirmed 8 days ago
B
Retailer 4
-
$4,903 USD
View
B
Retailer 5
-
$4,903 USD
View
B
Retailer 6
-
$4,905 USD
View
Retailer 7
-
$4,942 USD
View
Price last confirmed 28 days ago
B
Retailer 8
-
$4,970 USD
View
B
Retailer 9
-
$5,054 USD
View
B
Retailer 10
-
$5,657 USD
View
B
Retailer 11
-
$5,982 USD
View
B
Retailer 12
-
$7,600 USD
View
Most Expensive
B
NZ Jewellers
8df258f0-f6e5-44b8-aada-89b0f87417ad · Nov 5
$8,542 USD
View
12 more retailers have this diamond
Prices start from $3,904 USDSave up to $4,638 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
1.23ct Heart
$3,904 USD