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Round|Lab Grown|IGI

1.70ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG737547741

Shape and cutting style on the report: Round brilliant

Certificate IGI LG737547741

Diamond specifications and retailer prices

From £155 GBP
$208 USD
As of November 1, 2026
Save £837 GBP (84%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £993 GBP at Brilliant Earth · As of November 1, 2026
View at Brilliant Earth

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 IGI LG737547741 or 737547741. Listed at 17 retailers as of November 1, 2026, with prices from £155 to £993, a £837 spread on the same certified stone. Brilliant Earth lists it at £993. 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
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG737547741
Dimensions7.70 × 7.72 × 4.62 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.70 mm7.72 mm1.70 ctF / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateIGI LG737547741
Side View
Table 60.0%Crown 33.2°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 60.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £993 GBP|Low: £151 GBP|High: £1,261 GBP|Avg: £425 GBP|-21.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 2, 2026
Retailer 7£155 GBP
Retailer 4£173 GBP
Retailer 13£180 GBP
Retailer 3£192 GBP
Retailer 12£192 GBP
Retailer 9£220 GBP
Retailer 6£260 GBP
Retailer 10£353 GBP
Retailer 15£388 GBP
Retailer 16£389 GBP
Retailer 2£406 GBP
Retailer 17£617 GBP
Retailer 8£619 GBP
Retailer 14£619 GBP
Retailer 5£657 GBP
Retailer 11£770 GBP
Brilliant Earth£993 GBP

46 data points across 17 retailers

17 retailers£155 GBP to £993 GBP

A
Cheapest Retailer
-
£155 GBP
$208 USD
A
Retailer 2
-
£173 GBP
$232 USD
View
Final sale: no returns
A
Retailer 3
-
£180 GBP
$241 USD
View
Retailer 4
-
£192 GBP
$257 USD
View
Price last confirmed 8 days ago
A
Retailer 5
-
£192 GBP
$257 USD
View
A
Retailer 6
-
£220 GBP
HK$2,300 HKD
View
B+
Retailer 7
-
£260 GBP
$348 USD
View
A
Retailer 8
-
£353 GBP
View
A
Retailer 9
-
£388 GBP
$520 USD
View
A
Retailer 10
-
£389 GBP
$521 USD
View
A
Retailer 11
-
£406 GBP
€518 EUR
View
B
Retailer 12
-
£617 GBP
$827 USD
View
Retailer 13
-
£619 GBP
$830 USD
View
Price last confirmed 15 days ago
B
Retailer 14
-
£619 GBP
$830 USD
View
B+
Retailer 15
-
£657 GBP
$881 USD
View
B
Retailer 16
-
£770 GBP
View
Most Expensive
B
Brilliant Earth
16145445A · Nov 1
£993 GBP
$1,330 USD
View
16 more retailers have this diamond
Prices start from £155 GBPSave up to £837 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.

A
1.70ct Round
£155 GBP