Round|Natural|GIA

1.20ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 1557218523

Certificate GIA 1557218523

Diamond specifications and retailer prices

From $1,971 USD
As of November 6, 2026
Save $2,604 USD (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $5,474 USD at NZ Jewellers · As of October 3, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1557218523. Listed at 20 retailers as of November 4, 2026, with a 132% 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
K
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1557218523
Dimensions6.77 × 6.80 × 4.26 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Cavity, Indented Natural
Top View
6.77 mm6.80 mm1.20 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1557218523
Side View
Table 57.0%Crown 36°Girdle: THN-MEDPavilion 41°Culet: NoneDepth 62.8%

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: $2,042 USD|Low: $1,971 USD|High: $4,636 USD|Avg: $2,890 USD|-3.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 9$1,971 USD
Retailer 1$2,042 USD
Retailer 6$2,296 USD
Retailer 2$2,505 USD
Retailer 3$2,738 USD
Retailer 4$2,754 USD
Retailer 5$3,196 USD
Retailer 8$3,260 USD
Retailer 7$4,575 USD

27 data points across 9 retailers

20 retailers$1,971 USD to $4,575 USD

A
Cheapest Retailer
-
$1,971 USD
A
Retailer 2
-
$2,042 USD
View
B+
Retailer 3
-
$2,296 USD
View
B+
Retailer 4
-
$2,438 USD
View
B+
Retailer 5
-
$2,440 USD
View
B+
Retailer 6
-
$2,440 USD
View
B+
Retailer 7
-
$2,505 USD
View
Retailer 8
-
$2,618 USD
View
Price last confirmed 39 days ago
Retailer 9
-
$2,618 USD
View
Price last confirmed 25 days ago
B+
Retailer 10
-
$2,680 USD
View
Retailer 11
-
$2,719 USD
View
Price last confirmed 38 days ago
B
Retailer 12
-
$2,738 USD
View
B+
Retailer 13
-
$2,754 USD
View
B
Retailer 14
-
$2,759 USD
View
Retailer 15
-
$3,021 USD
View
Price last confirmed 38 days ago
B
Retailer 16
-
$3,196 USD
View
B
Retailer 17
-
$3,260 USD
View
B
Retailer 18
-
$4,575 USD
View
Retailer 19
-
$5,474 USD
View
Price last confirmed 39 days ago
Most Expensive
NZ Jewellers
91146f89-0f16-4898-9c1f-0dc4da1ab6cd · Oct 3
$5,474 USD
View
Price last confirmed 34 days ago
19 more retailers have this diamond
Prices start from $1,971 USDSave up to $2,604 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
$1,971 USD