Round|Natural|GIA

1.20ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 2556151106

Certificate GIA 2556151106

Diamond specifications and retailer prices

From $1,984 USD
As of November 6, 2026
Save $2,581 USD (57%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $5,632 USD at Queensmith · As of October 28, 2026
View at Queensmith

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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2556151106. Listed at 19 retailers as of November 4, 2026, with a 130% 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2556151106
Dimensions6.74 × 6.79 × 4.26 mm
L/W Ratio1.01
Top View
6.74 mm6.79 mm1.20 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2556151106
Side View
Table 57.0%Crown 36.5°Girdle: THN-STKPavilion 41.2°Culet: NoneDepth 62.9%

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: $5,632 USD|Low: $1,971 USD|High: $5,652 USD|Avg: $3,065 USD|+3.0%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 3$1,984 USD
Retailer 2$2,066 USD
Retailer 8$2,314 USD
Retailer 12$2,411 USD
Retailer 4$2,640 USD
Retailer 11$2,670 USD
Retailer 6$2,748 USD
Retailer 10$2,753 USD
Retailer 5$2,760 USD
Retailer 7$3,237 USD
Retailer 9$4,565 USD
Queensmith$5,632 USD

36 data points across 12 retailers

19 retailers$1,984 USD to $4,565 USD

A
Cheapest Retailer
-
$1,984 USD
A
Retailer 2
-
$2,066 USD
View
A
Retailer 3
-
$2,314 USD
View
A
Retailer 4
-
$2,411 USD
View
Final sale: no returns
A
Retailer 5
-
$2,458 USD
View
Retailer 6
-
$2,640 USD
View
Price last confirmed 39 days ago
Retailer 7
-
$2,640 USD
View
Price last confirmed 21 days ago
Retailer 8
-
$2,640 USD
View
Price last confirmed 17 days ago
A
Retailer 9
-
$2,670 USD
View
Retailer 10
-
$2,741 USD
View
Price last confirmed 38 days ago
A
Retailer 11
-
$2,748 USD
View
B+
Retailer 12
-
$2,753 USD
View
B+
Retailer 13
-
$2,760 USD
View
Retailer 14
-
$3,046 USD
View
Price last confirmed 38 days ago
B+
Retailer 15
-
$3,237 USD
View
B
Retailer 16
-
$4,565 USD
View
Retailer 17
-
$5,518 USD
View
Price last confirmed 20 days ago
Retailer 18
-
$5,518 USD
View
Price last confirmed 39 days ago
Most Expensive
Queensmith
2556151106 · Oct 28
$5,632 USD
£4,435 GBP
View
Price last confirmed 8 days ago
18 more retailers have this diamond
Prices start from $1,984 USDSave up to $2,581 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
$1,984 USD