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Round|Lab Grown|GIA

1.70ct F SI1 Round Lab Grown Diamond

EX • F/SI1 • GIA 2221720373

Certificate GIA 2221720373

Diamond specifications and retailer prices

From £509 GBP
$683 USD
As of November 2, 2026
Save £981 GBP (66%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £1,490 GBP at The Diamond Guys · As of November 1, 2026
View at The Diamond Guys

About this 1.7ct lab-grown round diamond

This 1.7ct lab-grown round sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2221720373. Listed at 3 retailers as of November 1, 2026, with prices from £509 to £1,490, a £981 spread on the same certified stone. The Diamond Guys lists it at £1,490. 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
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle41.4°
OriginLab Grown
Grading LabGIA
CertificateGIA 2221720373
Dimensions7.69 × 7.66 × 4.70 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
7.69 mm7.66 mm1.70 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2221720373
Side View
Table 60.0%Crown 34°Girdle: NUL-NULPavilion 41.4°Culet: NoneDepth 61.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £566 GBP|Low: £566 GBP|High: £1,490 GBP|Avg: £1,253 GBP
Retailer 1
Retailer 2
The Diamond Guys
October 29, 2026
Retailer 1£566 GBP
Retailer 2£1,126 GBP
The Diamond Guys£1,490 GBP

3 data points across 3 retailers

3 retailers£509 GBP to £1,490 GBP

B+
Cheapest Retailer
-
£509 GBP
$683 USD
B
Retailer 2
-
£1,126 GBP
CA$2,099 CAD
View
Most Expensive
B
The Diamond Guys
1779252904 · Nov 1
£1,490 GBP
$1,999 USD
View
2 more retailers have this diamond
Prices start from £509 GBPSave up to £981 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 Round
£509 GBP