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Round|Natural|GIA

1.60ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2507839323

Certificate GIA 2507839323

Diamond specifications and retailer prices

From $8,720 AUD
$6,125 USD
As of November 1, 2026
Save $6,847 AUD (44%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $18,682 AUD at NZ Jewellers · As of October 20, 2026
View at NZ Jewellers

About this 1.6ct natural round diamond

This 1.6ct natural round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2507839323. Listed at 18 retailers as of November 1, 2026, with a 79% 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

1.60
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2507839323
Dimensions7.46 × 7.41 × 4.60 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
7.46 mm7.41 mm1.60 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2507839323
Side View
Table 59.0%Crown 36°Girdle: ThickPavilion 40.6°Culet: NoneDepth 61.8%

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 1
Current: $18,682 AUD|Low: $7,784 AUD|High: $18,682 AUD|Avg: $11,895 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
November 2, 2026
Retailer 3$8,720 AUD
Retailer 4$9,340 AUD
Retailer 5$9,367 AUD
Retailer 6$10,119 AUD
Retailer 9$10,459 AUD
Retailer 14$10,769 AUD
Retailer 11$11,204 AUD
Retailer 12$11,204 AUD
Retailer 2$11,488 AUD
Retailer 13$11,574 AUD
Retailer 7$12,151 AUD
Retailer 10$13,724 AUD
Retailer 8$15,567 AUD
NZ Jewellers$18,682 AUD

38 data points across 14 retailers

18 retailers$8,720 AUD to $15,567 AUD

B+
Cheapest Retailer
-
$8,720 AUD
$6,125 USD
B+
Retailer 2
-
$8,825 AUD
$6,199 USD
View
Retailer 3
-
$9,340 AUD
$6,561 USD
View
Price last confirmed 17 days ago
B+
Retailer 4
-
$9,367 AUD
$6,580 USD
View
Retailer 5
-
$10,119 AUD
$7,108 USD
View
Price last confirmed 13 days ago
Retailer 6
-
$10,276 AUD
$7,218 USD
View
Price last confirmed 17 days ago
B+
Retailer 7
-
$10,459 AUD
£5,785 GBP
View
Retailer 8
-
$10,769 AUD
View
Price last confirmed 11 days ago
B
Retailer 9
-
$11,204 AUD
$7,870 USD
View
B
Retailer 10
-
$11,204 AUD
$7,870 USD
View
B+
Retailer 11
-
$11,488 AUD
£6,354 GBP
View
B+
Retailer 12
-
$11,574 AUD
$8,130 USD
View
Retailer 13
-
$11,676 AUD
$8,202 USD
View
Price last confirmed 12 days ago
B
Retailer 14
-
$12,151 AUD
€8,129 EUR
View
Retailer 15
-
$12,306 AUD
$8,644 USD
View
Price last confirmed 18 days ago
B
Retailer 16
-
$13,724 AUD
ZAR 155,738 ZAR
View
B
Retailer 17
-
$15,567 AUD
£8,610 GBP
View
Most Expensive
NZ Jewellers
718acebf-4c80-42b3-a339-20d5808f87ce · Oct 20
$18,682 AUD
$13,123 USD
View
Price last confirmed 12 days ago
17 more retailers have this diamond
Prices start from $8,720 AUDSave up to $6,847 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.

B+
1.60ct Round
$8,720 AUD