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Oval|Natural|IGI

1.78ct M SI2 Oval Natural Diamond

VG • M/SI2 • IGI 534245983

Shape and cutting style on the report: Oval modified brilliant

Certificate IGI 534245983

Diamond specifications and retailer prices

From $4,286 AUD
As of November 6, 2026
Save $4,123 AUD (49%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $8,409 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.78ct natural oval diamond

This 1.78ct natural oval sits in the one-and-a-half to two carat band, graded M colour (faint-tinted) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 534245983. Listed at 9 retailers as of November 5, 2026, with prices from $4,286 to $8,409, a $4,123 spread on the same certified stone. NZ Jewellers lists it at $8,409. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.78
Carat
M
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryGood
FluorescenceFaint
Crown angle35.4°
Pavilion angle30.9°
OriginNatural
Grading LabIGI
CertificateIGI 534245983
Dimensions8.31 × 6.04 × 4.35 mm
L/W Ratio1.38
Girdle conditionFaceted
Culet sizeNone
Top View
8.31 mm6.04 mm1.78 ctM / SI2
OriginNatural
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceFaint
CertificateIGI 534245983
Side View
Table 56.0%Crown 35.4°Girdle: MED-VTKPavilion 30.9°Culet: NoneDepth 72.0%

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: $5,648 AUD|Low: $3,157 AUD|High: $7,797 AUD|Avg: $5,134 AUD|+2.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 2$3,157 AUD
Retailer 10$4,286 AUD
Retailer 4$4,503 AUD
Retailer 6$4,826 AUD
Retailer 3$4,828 AUD
Retailer 8$5,036 AUD
Retailer 5$5,570 AUD
Retailer 1$5,648 AUD
Retailer 7$5,743 AUD
Retailer 9$7,797 AUD

18 data points across 10 retailers

9 retailers$4,286 AUD to $8,409 AUD

B+
Cheapest Retailer
-
$4,286 AUD
B+
Retailer 2
-
$4,503 AUD
View
B
Retailer 3
-
$4,826 AUD
View
Retailer 4
-
$4,828 AUD
View
Price last confirmed 8 days ago
B
Retailer 5
-
$5,012 AUD
View
B
Retailer 6
-
$5,036 AUD
View
B
Retailer 7
-
$5,570 AUD
View
B
Retailer 8
-
$5,648 AUD
View
Most Expensive
C
NZ Jewellers
873a39c3-eb57-4a1a-a547-6de8f25a720b · Nov 5
$8,409 AUD
$5,778 USD
View
8 more retailers have this diamond
Prices start from $4,286 AUDSave up to $4,123 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+
1.78ct Oval
$4,286 AUD