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Round|Natural|IGI

1.60ct D SI2 Round Natural Diamond

EX • D/SI2 • IGI 670408693

Shape and cutting style on the report: Round brilliant

Certificate IGI 670408693

Diamond specifications and retailer prices

From $9,850 AUD
$6,919 USD
As of October 30, 2026
Save $6,118 AUD (38%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $20,746 AUD at NZ Jewellers · As of September 28, 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 D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 670408693. Listed at 12 retailers as of October 29, 2026, with a 62% 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
D
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
Crown angle33.8°
Pavilion angle40.7°
OriginNatural
Grading LabIGI
CertificateIGI 670408693
Dimensions7.62 × 7.66 × 4.52 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.62 mm7.66 mm1.60 ctD / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateIGI 670408693
Side View
Table 60.0%Crown 33.8°Girdle: THN-MEDPavilion 40.7°Culet: NoneDepth 59.2%

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: Oct 30
Current: $12,453 AUD|Low: $8,895 AUD|High: $17,496 AUD|Avg: $13,001 AUD|-4.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 8$8,895 AUD
Retailer 5$9,850 AUD
Retailer 4$11,636 AUD
Retailer 2$11,757 AUD
Retailer 1$12,453 AUD
Retailer 6$14,787 AUD
Retailer 7$15,235 AUD
Retailer 3$15,968 AUD

32 data points across 8 retailers

12 retailers$9,850 AUD to $15,968 AUD

A
Cheapest Retailer
-
$9,850 AUD
$6,919 USD
B+
Retailer 2
-
$11,636 AUD
$8,173 USD
View
B+
Retailer 3
-
$11,757 AUD
£6,503 GBP
View
Retailer 4
-
$12,404 AUD
$8,713 USD
View
Price last confirmed 47 days ago
Retailer 5
-
$12,404 AUD
$8,713 USD
View
Price last confirmed 29 days ago
B+
Retailer 6
-
$12,453 AUD
€8,331 EUR
View
Retailer 7
-
$12,595 AUD
$8,847 USD
View
Price last confirmed 31 days ago
Retailer 8
-
$14,313 AUD
$10,054 USD
View
Price last confirmed 47 days ago
Retailer 9
-
$14,313 AUD
$10,054 USD
View
Price last confirmed 31 days ago
B
Retailer 10
-
$15,968 AUD
£8,832 GBP
View
Retailer 11
-
$20,746 AUD
$14,573 USD
View
Price last confirmed 46 days ago
Most Expensive
NZ Jewellers
0489f0d7-1261-4fdd-b7ae-c25e8d768b7a · Sep 28
$20,746 AUD
$14,573 USD
View
Price last confirmed 33 days ago
11 more retailers have this diamond
Prices start from $9,850 AUDSave up to $6,118 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
1.60ct Round
$9,850 AUD