Round|Natural|GIA

1.20ct D SI1 Round Natural Diamond

ID • D/SI1 • GIA 671

Certificate GIA 671

Diamond specifications and retailer prices

From €2,708 EUR
As of November 4, 2026
Save €4,888 EUR (64%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: €8,614 EUR at NZ Jewellers · As of September 24, 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. Listed at 28 retailers as of November 4, 2026, with a 181% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 671
Dimensions6.71 × 6.76 × 4.24 mm
L/W Ratio1.01
Top View
6.71 mm6.76 mm1.20 ctD / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 671
Side View
Table 56.0%CrownGirdle: Thin to Slightly ThickPavilionCulet: NDepth 62.9%

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 4
Current: €7,595 EUR|Low: €2,941 EUR|High: €7,732 EUR|Avg: €4,650 EUR|-1.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 6, 2026
Retailer 14€3,198 EUR
Retailer 11€3,658 EUR
Retailer 6€3,818 EUR
Retailer 7€4,067 EUR
Retailer 2€4,171 EUR
Retailer 13€4,186 EUR
Retailer 3€4,272 EUR
Retailer 9€4,359 EUR
Retailer 12€4,359 EUR
Retailer 8€4,811 EUR
Retailer 4€5,069 EUR
Retailer 5€5,149 EUR
Retailer 10€6,924 EUR
NZ Jewellers€7,595 EUR

29 data points across 14 retailers

28 retailers€2,708 EUR to €7,595 EUR

A
Cheapest Retailer
-
€2,708 EUR
A
Retailer 2
-
€2,933 EUR
View
A
Retailer 3
-
€3,198 EUR
View
B+
Retailer 4
-
€3,465 EUR
View
B+
Retailer 5
-
€3,658 EUR
View
Retailer 6
-
€3,712 EUR
View
Price last confirmed 15 days ago
B+
Retailer 7
-
€3,818 EUR
View
B+
Retailer 8
-
€4,067 EUR
View
Retailer 9
-
€4,142 EUR
View
Price last confirmed 10 days ago
B+
Retailer 10
-
€4,171 EUR
View
B+
Retailer 11
-
€4,186 EUR
View
B+
Retailer 12
-
€4,272 EUR
View
B+
Retailer 13
-
€4,359 EUR
View
B+
Retailer 14
-
€4,359 EUR
View
Retailer 15
-
€4,438 EUR
View
Price last confirmed 15 days ago
B+
Retailer 16
-
€4,811 EUR
View
B+
Retailer 17
-
€5,069 EUR
View
B+
Retailer 18
-
€5,149 EUR
View
Retailer 19
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€5,150 EUR
View
Price last confirmed 60 days ago
Retailer 20
-
€5,150 EUR
View
Price last confirmed 50 days ago
Retailer 21
-
€5,150 EUR
View
Price last confirmed 50 days ago
Retailer 22
-
€5,150 EUR
View
Price last confirmed 45 days ago
Retailer 23
-
€5,150 EUR
View
Price last confirmed 44 days ago
B
Retailer 24
-
€6,924 EUR
View
B
Retailer 25
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€6,976 EUR
View
B
Retailer 26
-
€7,595 EUR
View
Retailer 27
-
€8,614 EUR
View
Price last confirmed 49 days ago
Most Expensive
NZ Jewellers
d0f9916a-4647-440b-a993-8f6e9e83742b · Sep 24
€8,614 EUR
$9,617 USD
View
Price last confirmed 43 days ago
27 more retailers have this diamond
Prices start from €2,708 EURSave up to €4,888 EUR

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
€2,708 EUR