Oval|Lab Grown|GIA

16.45ct F SI1 Oval Lab Grown Diamond

ID • F/SI1 • GIA 6475896192

Certificate GIA 6475896192

Diamond specifications and retailer prices

From £4,318 GBP
$5,786 USD
As of October 31, 2026
Save £1,340 GBP (24%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £5,658 GBP at NZ Jewellers · As of October 31, 2026
View at NZ Jewellers

About this 16.45ct lab-grown oval diamond

This 16.45ct lab-grown oval sits in the over five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6475896192. Listed at 3 retailers as of October 31, 2026, with prices from £4,318 to £5,658, a £1,340 spread on the same certified stone. NZ Jewellers lists it at £5,658. 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

16.45
Carat
F
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginLab Grown
Grading LabGIA
CertificateGIA 6475896192
Dimensions20.38 × 14.40 × 9.04 mm
L/W Ratio1.42
Culet sizeNone
Key to symbols
Growth Remnant
Top View
20.38 mm14.40 mm16.45 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6475896192
Side View
Table 58.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 62.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 31
Current: £5,658 GBP|Low: £4,318 GBP|High: £22,793 GBP|Avg: £10,883 GBP|+27.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
November 1, 2026
Retailer 3£4,318 GBP
Retailer 2£5,172 GBP
NZ Jewellers£5,658 GBP
Retailer 4£22,793 GBP

3 data points across 4 retailers

3 retailers£4,318 GBP to £5,658 GBP

B+
Cheapest Retailer
-
£4,318 GBP
$5,786 USD
B+
Retailer 2
-
£5,172 GBP
$6,930 USD
View
Most Expensive
B
NZ Jewellers
6ea7ee89-4552-44fa-8134-77236f1f3812 · Oct 31
£5,658 GBP
$7,581 USD
View
2 more retailers have this diamond
Prices start from £4,318 GBPSave up to £1,340 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+
16.45ct Oval
£4,318 GBP