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Cushion|Lab Grown|GIA

3.17ct F SI1 Cushion Lab Grown Diamond

VG • F/SI1

Diamond specifications and retailer prices

From £844 GBP
As of November 6, 2026
Save £2,916 GBP (78%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £3,760 GBP at Washington Diamond · As of November 6, 2026
View at Washington Diamond

About this 3.17ct lab-grown cushion diamond

This 3.17ct lab-grown cushion sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA. Listed at 4 retailers as of November 6, 2026, with prices from £844 to £3,760, a £2,916 spread on the same certified stone. Washington Diamond lists it at £3,760. 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

3.17
Carat
F
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginLab Grown
Grading LabGIA
Dimensions9.44 × 8.08 × 5.34 mm
L/W Ratio1.17
Top View
9.44 mm8.08 mm3.17 ctF / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA
Side View
Table 61.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 66.1%

Caratlytics Score

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

Last verified: Nov 6
Current: £1,111 GBP|Low: £829 GBP|High: £3,760 GBP|Avg: £1,700 GBP|+1.6%
Retailer 1
Retailer 2
Retailer 3
Washington Diamond
November 6, 2026
Retailer 2£844 GBP
Retailer 1£1,111 GBP
Retailer 3£3,101 GBP
Washington Diamond£3,760 GBP

40 data points across 4 retailers

4 retailers£844 GBP to £3,760 GBP

B+
Cheapest Retailer
-
£844 GBP
B+
Retailer 2
-
£1,111 GBP
View
C
Retailer 3
-
£3,101 GBP
View
Most Expensive
C
Washington Diamond
1986529697 · Nov 6
£3,760 GBP
$5,033 USD
View
3 more retailers have this diamond
Prices start from £844 GBPSave up to £2,916 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+
3.17ct Cushion
£844 GBP