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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 $3,688 SGD
As of November 4, 2026
Save $2,631 SGD (42%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $7,923 SGD 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: $4,011 SGD|Low: $3,688 SGD|High: $6,414 SGD|Avg: $4,477 SGD|+1.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 3$3,688 SGD
Retailer 7$3,790 SGD
Retailer 4$3,794 SGD
Retailer 1$4,011 SGD
Retailer 5$4,418 SGD
Retailer 6$4,657 SGD
Retailer 2$6,320 SGD

40 data points across 7 retailers

12 retailers$3,688 SGD to $6,320 SGD

A
Cheapest Retailer
-
$3,688 SGD
Retailer 2
-
$3,790 SGD
View
Price last confirmed 29 days ago
Retailer 3
-
$3,790 SGD
View
Price last confirmed 29 days ago
Retailer 4
-
$3,790 SGD
View
Price last confirmed 12 days ago
B+
Retailer 5
-
$3,794 SGD
View
Retailer 6
-
$3,936 SGD
View
Price last confirmed 38 days ago
B+
Retailer 7
-
$4,011 SGD
View
Retailer 8
-
$4,373 SGD
View
Price last confirmed 38 days ago
B+
Retailer 9
-
$4,418 SGD
View
B
Retailer 10
-
$4,657 SGD
View
B
Retailer 11
-
$6,320 SGD
View
Most Expensive
NZ Jewellers
ab1446d7-8a71-4d6a-9e2f-43d654f7ab9b · Sep 29
$7,923 SGD
$6,182 USD
View
Price last confirmed 38 days ago
11 more retailers have this diamond
Prices start from $3,688 SGDSave up to $2,631 SGD

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
$3,688 SGD