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Round|Natural|GIA

1.20ct E SI2 Round Natural Diamond

EX • E/SI2 • GIA 2507071877

Certificate GIA 2507071877

Diamond specifications and retailer prices

From $4,900 AUD
As of November 1, 2026
Save $4,887 AUD (50%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $10,707 AUD 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 E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2507071877. Listed at 17 retailers as of November 1, 2026, with a 100% 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
E
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceMedium
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2507071877
Dimensions6.82 × 6.77 × 4.22 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
6.82 mm6.77 mm1.20 ctE / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2507071877
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.1%

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 1
Current: $10,707 AUD|Low: $4,900 AUD|High: $10,707 AUD|Avg: $6,587 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 6, 2026
Retailer 6$4,900 AUD
Retailer 13$5,000 AUD
Retailer 7$5,014 AUD
Retailer 2$5,394 AUD
Retailer 4$5,567 AUD
Retailer 5$5,567 AUD
Retailer 14$5,623 AUD
Retailer 15$5,781 AUD
Retailer 16$5,838 AUD
Retailer 11$6,195 AUD
Retailer 9$6,424 AUD
Retailer 17$6,487 AUD
Retailer 10$6,594 AUD
Retailer 8$6,954 AUD
Retailer 3$8,975 AUD
Retailer 12$9,787 AUD
NZ Jewellers$10,707 AUD

35 data points across 17 retailers

17 retailers$4,900 AUD to $9,787 AUD

A
Cheapest Retailer
-
$4,900 AUD
A
Retailer 2
-
$5,000 AUD
View
A
Retailer 3
-
$5,014 AUD
View
B+
Retailer 4
-
$5,394 AUD
View
B+
Retailer 5
-
$5,567 AUD
View
Retailer 6
-
$5,567 AUD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$5,623 AUD
View
Retailer 8
-
$5,781 AUD
View
Price last confirmed 8 days ago
B+
Retailer 9
-
$5,838 AUD
View
B+
Retailer 10
-
$6,195 AUD
View
B+
Retailer 11
-
$6,424 AUD
View
B+
Retailer 12
-
$6,487 AUD
View
B+
Retailer 13
-
$6,594 AUD
View
Retailer 14
-
$6,954 AUD
View
Price last confirmed 14 days ago
B
Retailer 15
-
$8,975 AUD
View
B
Retailer 16
-
$9,787 AUD
View
Most Expensive
B
NZ Jewellers
1060eb82-9990-42f9-97a0-fa67a846bcfc · Oct 30
$10,707 AUD
$7,495 USD
View
Price last confirmed 7 days ago
16 more retailers have this diamond
Prices start from $4,900 AUDSave up to $4,887 AUD

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
$4,900 AUD