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Round|Natural|GIA

1.20ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 1557218523

Certificate GIA 1557218523

Diamond specifications and retailer prices

From $3,555 NZD
As of November 6, 2026
Save $4,697 NZD (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $9,875 NZD 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $5,886 NZD|Low: $3,555 NZD|High: $8,363 NZD|Avg: $5,198 NZD|+0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 9$3,555 NZD
Retailer 2$3,684 NZD
Retailer 7$4,142 NZD
Retailer 3$4,519 NZD
Retailer 4$4,939 NZD
Retailer 5$4,968 NZD
Retailer 6$5,765 NZD
Retailer 1$5,886 NZD
Retailer 8$8,253 NZD

27 data points across 9 retailers

20 retailers$3,555 NZD to $8,253 NZD

A
Cheapest Retailer
-
$3,555 NZD
A
Retailer 2
-
$3,684 NZD
View
B+
Retailer 3
-
$4,142 NZD
View
B+
Retailer 4
-
$4,398 NZD
View
B+
Retailer 5
-
$4,402 NZD
View
B+
Retailer 6
-
$4,402 NZD
View
B+
Retailer 7
-
$4,519 NZD
View
Retailer 8
-
$4,723 NZD
View
Price last confirmed 40 days ago
Retailer 9
-
$4,723 NZD
View
Price last confirmed 26 days ago
B+
Retailer 10
-
$4,834 NZD
View
Retailer 11
-
$4,905 NZD
View
Price last confirmed 39 days ago
B
Retailer 12
-
$4,939 NZD
View
B+
Retailer 13
-
$4,968 NZD
View
B
Retailer 14
-
$4,977 NZD
View
Retailer 15
-
$5,450 NZD
View
Price last confirmed 39 days ago
B
Retailer 16
-
$5,765 NZD
View
B
Retailer 17
-
$5,886 NZD
View
B
Retailer 18
-
$8,253 NZD
View
Retailer 19
-
$9,875 NZD
View
Price last confirmed 40 days ago
Most Expensive
NZ Jewellers
91146f89-0f16-4898-9c1f-0dc4da1ab6cd · Oct 3
$9,875 NZD
$5,474 USD
View
Price last confirmed 34 days ago
19 more retailers have this diamond
Prices start from $3,555 NZDSave up to $4,697 NZD

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
$3,555 NZD