Round|Natural|GIA

1.20ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1548587129

Certificate GIA 1548587129

Diamond specifications and retailer prices

From $5,338 NZD
As of November 4, 2026
Save $4,701 NZD (47%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $12,106 NZD at NZ Jewellers · As of October 20, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1548587129. Listed at 23 retailers as of November 4, 2026, with a 88% 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
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1548587129
Dimensions6.78 × 6.75 × 4.22 mm
L/W Ratio1.00
Girdle conditionSlightly Thick
Key to symbols
Crystal, Feather, Needle
Top View
6.78 mm6.75 mm1.20 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1548587129
Side View
Table 58.0%Crown 35.5°Girdle: Slightly ThickPavilion 41°Culet: NoneDepth 62.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $7,849 NZD|Low: $5,338 NZD|High: $11,758 NZD|Avg: $7,392 NZD|+13.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 4$5,338 NZD
Retailer 9$5,377 NZD
Retailer 8$5,522 NZD
Retailer 2$6,159 NZD
Retailer 7$7,441 NZD
Retailer 3$7,596 NZD
Retailer 1$7,849 NZD
Retailer 6$8,433 NZD
Retailer 5$11,680 NZD

42 data points across 9 retailers

23 retailers$5,338 NZD to $10,039 NZD

B+
Cheapest Retailer
-
$5,338 NZD
B+
Retailer 2
-
$5,377 NZD
View
B+
Retailer 3
-
$5,430 NZD
View
B+
Retailer 4
-
$5,522 NZD
View
Final sale: no returns
Retailer 5
-
$5,587 NZD
View
Price last confirmed 18 days ago
B+
Retailer 6
-
$5,978 NZD
View
Retailer 7
-
$6,061 NZD
View
Price last confirmed 16 days ago
Retailer 8
-
$6,159 NZD
View
Retailer 9
-
$6,296 NZD
View
Price last confirmed 22 days ago
Retailer 10
-
$6,296 NZD
View
Price last confirmed 18 days ago
Retailer 11
-
$6,537 NZD
View
Price last confirmed 23 days ago
B
Retailer 12
-
$6,844 NZD
View
B
Retailer 13
-
$6,844 NZD
View
Retailer 14
-
$7,263 NZD
View
Price last confirmed 17 days ago
Retailer 15
-
$7,441 NZD
View
Price last confirmed 30 days ago
B+
Retailer 16
-
$7,596 NZD
View
B
Retailer 17
-
$7,849 NZD
View
Retailer 18
-
$7,865 NZD
View
Price last confirmed 23 days ago
B
Retailer 19
-
$8,168 NZD
View
Retailer 20
-
$8,433 NZD
View
Price last confirmed 21 days ago
B
Retailer 21
-
$10,039 NZD
View
Retailer 22
-
$11,680 NZD
View
Price last confirmed 17 days ago
Most Expensive
NZ Jewellers
0a40bb14-684d-41c6-873e-4e48ee2e3721 · Oct 20
$12,106 NZD
$6,711 USD
View
Price last confirmed 17 days ago
22 more retailers have this diamond
Prices start from $5,338 NZDSave up to $4,701 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.

B+
1.20ct Round
$5,338 NZD