Round|Natural|GIA

1.20ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 1242104470

Certificate GIA 1242104470

Diamond specifications and retailer prices

From $3,174 USD
As of November 6, 2026
Save $3,737 USD (54%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $6,911 USD at MOH London · As of November 1, 2026
View at MOH London

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 1242104470. Listed at 7 retailers as of November 1, 2026, with prices from $3,174 to $6,911, a $3,737 spread on the same certified stone. MOH London lists it at $6,911. 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°
OriginNatural
Grading LabGIA
CertificateGIA 1242104470
Dimensions6.71 × 6.76 × 4.21 mm
L/W Ratio1.01
Key to symbols
Crystal, Pinpoint
Top View
6.71 mm6.76 mm1.20 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1242104470
Side View
Table 59.0%CrownGirdle: MED-STKPavilion 41°Culet: NoneDepth 62.6%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: $6,911 USD|Low: $3,174 USD|High: $6,911 USD|Avg: $4,289 USD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 5$3,174 USD
Retailer 4$3,643 USD
Retailer 7$3,829 USD
Retailer 3$4,004 USD
Retailer 2$4,110 USD
Retailer 6$4,775 USD
MOH London$6,911 USD

8 data points across 7 retailers

7 retailers$3,174 USD to $6,911 USD

A
Cheapest Retailer
-
$3,174 USD
A
Retailer 2
-
$3,643 USD
View
B+
Retailer 3
-
$3,829 USD
View
B+
Retailer 4
-
$4,004 USD
View
B+
Retailer 5
-
$4,110 USD
View
B+
Retailer 6
-
$4,775 USD
View
Most Expensive
B
MOH London
49913240E · Nov 1
$6,911 USD
£5,442 GBP
View
6 more retailers have this diamond
Prices start from $3,174 USDSave up to $3,737 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
$3,174 USD