Round|Natural|GIA

1.20ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 3555551384

Certificate GIA 3555551384

Diamond specifications and retailer prices

From $2,496 USD
As of November 6, 2026
Save $3,455 USD (58%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $5,951 USD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.2ct natural round diamond

This 1.2ct natural round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 3555551384. Listed at 9 retailers as of November 5, 2026, with prices from $2,496 to $5,951, a $3,455 spread on the same certified stone. NZ Jewellers lists it at $5,951. 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

1.20
Carat
D
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 3555551384
Dimensions6.68 × 6.73 × 4.26 mm
L/W Ratio1.01
Key to symbols
Crystal, Cloud, Feather, Needle, Indented Natural, Natural
Top View
6.68 mm6.73 mm1.20 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 3555551384
Side View
Table 58.0%CrownGirdle: Slightly ThickPavilion 41.6°Culet: NoneDepth 63.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $5,951 USD|Low: $2,496 USD|High: $6,334 USD|Avg: $4,030 USD|-6.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 2$2,496 USD
Retailer 5$2,963 USD
Retailer 9$3,047 USD
Retailer 8$3,416 USD
Retailer 3$3,463 USD
Retailer 7$3,547 USD
Retailer 6$3,982 USD
Retailer 4$5,697 USD
NZ Jewellers$5,951 USD

41 data points across 9 retailers

9 retailers$2,496 USD to $5,951 USD

A
Cheapest Retailer
-
$2,496 USD
A
Retailer 2
-
$2,963 USD
View
A
Retailer 3
-
$3,047 USD
View
A
Retailer 4
-
$3,416 USD
View
A
Retailer 5
-
$3,463 USD
View
A
Retailer 6
-
$3,547 USD
View
B+
Retailer 7
-
$3,982 USD
View
B+
Retailer 8
-
$5,697 USD
View
Most Expensive
B
NZ Jewellers
b7335a54-dc7a-46d8-b154-9af7e0d6ced2 · Nov 5
$5,951 USD
View
8 more retailers have this diamond
Prices start from $2,496 USDSave up to $3,455 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.

A
1.20ct Round
$2,496 USD