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Oval|Natural|GIA

1.40ct K SI1 Oval Natural Diamond

ID • K/SI1 • GIA 6237918691

Certificate GIA 6237918691

Diamond specifications and retailer prices

From $4,189 AUD
As of November 4, 2026
Save $2,988 AUD (42%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $8,997 AUD at NZ Jewellers · As of September 29, 2026
View at NZ Jewellers

About this 1.4ct natural oval diamond

This 1.4ct natural oval sits in the one-and-a-quarter to one-and-a-half carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6237918691. Listed at 12 retailers as of November 4, 2026, with a 71% 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

1.40
Carat
K
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6237918691
Dimensions5.86 × 9.50 × 3.73 mm
L/W Ratio1.62
Top View
5.86 mm9.50 mm1.40 ctK / SI1
OriginNatural
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6237918691
Side View
Table 58.0%CrownGirdlePavilionCulet: NoneDepth 63.6%

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 4
Current: $4,555 AUD|Low: $4,189 AUD|High: $7,284 AUD|Avg: $5,084 AUD|+1.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 3$4,189 AUD
Retailer 7$4,304 AUD
Retailer 4$4,308 AUD
Retailer 1$4,555 AUD
Retailer 5$5,017 AUD
Retailer 6$5,289 AUD
Retailer 2$7,177 AUD

40 data points across 7 retailers

12 retailers$4,189 AUD to $7,177 AUD

A
Cheapest Retailer
-
$4,189 AUD
Retailer 2
-
$4,304 AUD
View
Price last confirmed 29 days ago
Retailer 3
-
$4,304 AUD
View
Price last confirmed 29 days ago
Retailer 4
-
$4,304 AUD
View
Price last confirmed 12 days ago
B+
Retailer 5
-
$4,308 AUD
View
Retailer 6
-
$4,470 AUD
View
Price last confirmed 38 days ago
B+
Retailer 7
-
$4,555 AUD
View
Retailer 8
-
$4,966 AUD
View
Price last confirmed 38 days ago
B+
Retailer 9
-
$5,017 AUD
View
B
Retailer 10
-
$5,289 AUD
View
B
Retailer 11
-
$7,177 AUD
View
Most Expensive
NZ Jewellers
ab1446d7-8a71-4d6a-9e2f-43d654f7ab9b · Sep 29
$8,997 AUD
$6,182 USD
View
Price last confirmed 38 days ago
11 more retailers have this diamond
Prices start from $4,189 AUDSave up to $2,988 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
1.40ct Oval
$4,189 AUD