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Round|Natural|GIA

1.20ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2504814178

Certificate GIA 2504814178

Diamond specifications and retailer prices

From $5,524 NZD
As of November 6, 2026
Save $6,936 NZD (56%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $12,460 NZD at NZ Jewellers · As of November 5, 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 November 5, 2026, with prices from $5,524 to $12,460, a $6,936 spread on the same certified stone. NZ Jewellers lists it at $12,460. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $5,922 NZD|Low: $5,168 NZD|High: $12,102 NZD|Avg: $7,583 NZD|+14.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 2$5,524 NZD
Retailer 1$5,922 NZD
Retailer 9$6,085 NZD
Retailer 3$6,664 NZD
Retailer 4$7,198 NZD
Retailer 6$7,403 NZD
Retailer 10$7,659 NZD
Retailer 7$7,822 NZD
Retailer 5$8,727 NZD
Retailer 8$11,958 NZD

43 data points across 10 retailers

22 retailers$5,524 NZD to $12,460 NZD

B+
Cheapest Retailer
-
$5,524 NZD
B+
Retailer 2
-
$5,588 NZD
View
B+
Retailer 3
-
$5,753 NZD
View
B+
Retailer 4
-
$5,922 NZD
View
Final sale: no returns
B+
Retailer 5
-
$5,947 NZD
View
B+
Retailer 6
-
$6,085 NZD
View
B+
Retailer 7
-
$6,223 NZD
View
B+
Retailer 8
-
$6,478 NZD
View
Retailer 9
-
$6,478 NZD
View
Price last confirmed 9 days ago
B+
Retailer 10
-
$6,485 NZD
View
B+
Retailer 11
-
$6,664 NZD
View
B+
Retailer 12
-
$7,198 NZD
View
B+
Retailer 13
-
$7,234 NZD
View
B+
Retailer 14
-
$7,234 NZD
View
B+
Retailer 15
-
$7,403 NZD
View
B
Retailer 16
-
$7,468 NZD
View
Retailer 17
-
$7,659 NZD
View
Price last confirmed 30 days ago
B+
Retailer 18
-
$7,822 NZD
View
Retailer 19
-
$8,096 NZD
View
Price last confirmed 15 days ago
B
Retailer 20
-
$8,727 NZD
View
B
Retailer 21
-
$11,958 NZD
View
Most Expensive
B
NZ Jewellers
08346862-4419-48e2-ab77-6760ed94a92f · Nov 5
$12,460 NZD
$6,907 USD
View
21 more retailers have this diamond
Prices start from $5,524 NZDSave up to $6,936 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
$5,524 NZD