Round|Natural|GIA

1.20ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1548587129

Certificate GIA 1548587129

Diamond specifications and retailer prices

From $2,959 USD
As of November 4, 2026
Save $2,606 USD (47%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $6,711 USD 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 22 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
Color
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: $4,351 USD|Low: $2,959 USD|High: $6,518 USD|Avg: $4,103 USD|+13.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 3$2,959 USD
Retailer 8$2,981 USD
Retailer 7$3,061 USD
Retailer 6$4,125 USD
Retailer 2$4,211 USD
Retailer 1$4,351 USD
Retailer 5$4,675 USD
Retailer 4$6,475 USD

42 data points across 8 retailers

22 retailers$2,959 USD to $5,565 USD

B+
Cheapest Retailer
-
$2,959 USD
B+
Retailer 2
-
$2,981 USD
View
B+
Retailer 3
-
$3,010 USD
View
B+
Retailer 4
-
$3,061 USD
View
Final sale: no returns
Retailer 5
-
$3,097 USD
View
Price last confirmed 17 days ago
B+
Retailer 6
-
$3,314 USD
View
Retailer 7
-
$3,360 USD
View
Price last confirmed 15 days ago
Retailer 8
-
$3,490 USD
View
Price last confirmed 21 days ago
Retailer 9
-
$3,490 USD
View
Price last confirmed 17 days ago
Retailer 10
-
$3,624 USD
View
Price last confirmed 22 days ago
B
Retailer 11
-
$3,794 USD
View
B
Retailer 12
-
$3,794 USD
View
Retailer 13
-
$4,026 USD
View
Price last confirmed 16 days ago
Retailer 14
-
$4,125 USD
View
Price last confirmed 29 days ago
B+
Retailer 15
-
$4,211 USD
View
B
Retailer 16
-
$4,351 USD
View
Retailer 17
-
$4,360 USD
View
Price last confirmed 22 days ago
B
Retailer 18
-
$4,528 USD
View
Retailer 19
-
$4,675 USD
View
Price last confirmed 20 days ago
B
Retailer 20
-
$5,565 USD
View
Retailer 21
-
$6,475 USD
View
Price last confirmed 16 days ago
Most Expensive
NZ Jewellers
0a40bb14-684d-41c6-873e-4e48ee2e3721 · Oct 20
$6,711 USD
View
Price last confirmed 17 days ago
21 more retailers have this diamond
Prices start from $2,959 USDSave up to $2,606 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.

B+
1.20ct Round
$2,959 USD