Round|Natural|GIA

1.20ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2504814178

Certificate GIA 2504814178

Diamond specifications and retailer prices

From $3,062 USD
As of October 30, 2026
Save $3,845 USD (56%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $6,907 USD at NZ Jewellers · As of October 30, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2504814178. Listed at 22 retailers as of October 30, 2026, with prices from $3,062 to $6,907, a $3,845 spread on the same certified stone. NZ Jewellers lists it at $6,907. 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
I
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 2504814178
Dimensions6.87 × 6.85 × 4.18 mm
L/W Ratio1.00
Star length55%
Lower girdle75%
Top View
6.87 mm6.85 mm1.20 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2504814178
Side View
Table 60.0%Crown 32°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 61.0%

Caratlytics Score

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

Price History

Last verified: Oct 30
Current: $4,386 USD|Low: $2,865 USD|High: $6,709 USD|Avg: $4,210 USD|+3.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 9$3,062 USD
Retailer 6$3,314 USD
Retailer 5$3,373 USD
Retailer 8$3,730 USD
Retailer 2$4,030 USD
Retailer 7$4,246 USD
Retailer 1$4,386 USD
Retailer 4$4,827 USD
Retailer 3$6,665 USD

41 data points across 9 retailers

22 retailers$3,062 USD to $6,907 USD

B+
Cheapest Retailer
-
$3,062 USD
B+
Retailer 2
-
$3,098 USD
View
B+
Retailer 3
-
$3,189 USD
View
B+
Retailer 4
-
$3,297 USD
A$5,073 AUD
View
B+
Retailer 5
-
$3,314 USD
View
Final sale: no returns
B+
Retailer 6
-
$3,373 USD
View
B+
Retailer 7
-
$3,450 USD
View
B+
Retailer 8
-
$3,591 USD
View
B+
Retailer 9
-
$3,591 USD
View
B+
Retailer 10
-
$3,596 USD
View
B
Retailer 11
-
$3,730 USD
View
B+
Retailer 12
-
$4,010 USD
View
B+
Retailer 13
-
$4,010 USD
View
B+
Retailer 14
-
$4,030 USD
£3,173 GBP
View
B
Retailer 15
-
$4,140 USD
View
B
Retailer 16
-
$4,144 USD
View
Retailer 17
-
$4,246 USD
A$6,533 AUD
View
Price last confirmed 22 days ago
B
Retailer 18
-
$4,386 USD
€4,177 EUR
View
Retailer 19
-
$4,488 USD
View
Price last confirmed 7 days ago
B
Retailer 20
-
$4,827 USD
ZAR 77,986 ZAR
View
B
Retailer 21
-
$6,665 USD
£5,248 GBP
View
Most Expensive
B
NZ Jewellers
08346862-4419-48e2-ab77-6760ed94a92f · Oct 30
$6,907 USD
View
21 more retailers have this diamond
Prices start from $3,062 USDSave up to $3,845 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
$3,062 USD