Round|Natural|GIA

1.20ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6551702477

Certificate GIA 6551702477

Diamond specifications and retailer prices

From $2,365 USD
As of November 6, 2026
Save $2,876 USD (55%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $5,687 USD at NZ Jewellers · As of September 21, 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 6551702477. Listed at 15 retailers as of November 4, 2026, with a 122% 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
FluorescenceNone
Crown angle36°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 6551702477
Dimensions6.73 × 6.77 × 4.27 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Crystal, Feather, Needle, Indented Natural
Top View
6.73 mm6.77 mm1.20 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551702477
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 63.3%

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: $2,365 USD|Low: $2,342 USD|High: $5,407 USD|Avg: $3,246 USD|-4.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 1$2,365 USD
Retailer 6$2,368 USD
Retailer 7$2,900 USD
Retailer 2$3,007 USD
Retailer 8$3,291 USD
Retailer 4$3,466 USD
Retailer 5$3,630 USD
Retailer 3$5,241 USD

33 data points across 8 retailers

15 retailers$2,365 USD to $5,241 USD

A
Cheapest Retailer
-
$2,365 USD
A
Retailer 2
-
$2,368 USD
View
A
Retailer 3
-
$2,900 USD
View
Final sale: no returns
B+
Retailer 4
-
$3,007 USD
View
B+
Retailer 5
-
$3,170 USD
View
Retailer 6
-
$3,179 USD
View
Price last confirmed 27 days ago
Retailer 7
-
$3,264 USD
View
Price last confirmed 44 days ago
Retailer 8
-
$3,291 USD
View
Price last confirmed 11 days ago
Retailer 9
-
$3,390 USD
View
Price last confirmed 38 days ago
Retailer 10
-
$3,434 USD
View
Price last confirmed 33 days ago
B+
Retailer 11
-
$3,466 USD
View
B
Retailer 12
-
$3,630 USD
View
B
Retailer 13
-
$5,241 USD
View
Retailer 14
-
$5,538 USD
View
Price last confirmed 28 days ago
Most Expensive
NZ Jewellers
764b46a2-f97f-43e9-b099-3127678bd407 · Sep 21
$5,687 USD
View
Price last confirmed 45 days ago
14 more retailers have this diamond
Prices start from $2,365 USDSave up to $2,876 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
$2,365 USD