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Oval|Natural|GIA

1.70ct K SI1 Oval Natural Diamond

EX • K/SI1 • GIA 7538644928

Certificate GIA 7538644928

Diamond specifications and retailer prices

From £3,935 GBP
As of November 5, 2026
Save £4,489 GBP (53%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £8,424 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.7ct natural oval diamond

This 1.7ct natural oval sits in the one-and-a-half to two 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 7538644928. Listed at 15 retailers as of November 5, 2026, with prices from £3,935 to £8,424, a £4,489 spread on the same certified stone. NZ Jewellers lists it at £8,424. 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

1.70
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 7538644928
Dimensions9.62 × 6.87 × 3.92 mm
L/W Ratio1.40
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Knot, Needle
Top View
9.62 mm6.87 mm1.70 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7538644928
Side View
Table 63.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 57.0%

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 5
Current: £8,424 GBP|Low: £3,980 GBP|High: £8,424 GBP|Avg: £5,412 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 3£3,980 GBP
Retailer 8£4,251 GBP
Retailer 7£4,563 GBP
Retailer 10£4,563 GBP
Retailer 4£4,784 GBP
Retailer 9£4,812 GBP
Retailer 2£5,183 GBP
Retailer 11£5,266 GBP
Retailer 5£6,146 GBP
Retailer 6£7,401 GBP
NZ Jewellers£8,424 GBP

45 data points across 11 retailers

15 retailers£3,935 GBP to £8,424 GBP

B+
Cheapest Retailer
-
£3,935 GBP
B+
Retailer 2
-
£3,980 GBP
View
B+
Retailer 3
-
£4,032 GBP
View
B+
Retailer 4
-
£4,247 GBP
View
B+
Retailer 5
-
£4,251 GBP
View
Retailer 6
-
£4,563 GBP
View
Price last confirmed 8 days ago
B
Retailer 7
-
£4,563 GBP
View
B
Retailer 8
-
£4,563 GBP
View
B+
Retailer 9
-
£4,784 GBP
View
B+
Retailer 10
-
£4,812 GBP
View
B
Retailer 11
-
£5,183 GBP
View
B
Retailer 12
-
£5,266 GBP
View
B
Retailer 13
-
£6,146 GBP
View
B
Retailer 14
-
£7,401 GBP
View
Most Expensive
B
NZ Jewellers
fa1220ba-5911-4b21-8345-b46780fbcea1 · Nov 5
£8,424 GBP
$11,276 USD
View
14 more retailers have this diamond
Prices start from £3,935 GBPSave up to £4,489 GBP

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+
1.70ct Oval
£3,935 GBP