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1.68ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG831655335

Shape and cutting style on the report: Round brilliant

Certificate IGI LG831655335

Diamond specifications and retailer prices

From £155 GBP
$206 USD
As of October 29, 2026
Save £755 GBP (83%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £910 GBP at Reve Diamonds · As of October 28, 2026
View at Reve Diamonds

About this 1.68ct lab-grown round diamond

This 1.68ct lab-grown round sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG831655335 or 831655335. Listed at 9 retailers as of October 28, 2026, with prices from £155 to £910, a £755 spread on the same certified stone. Reve Diamonds lists it at £910. 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

1.68
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.9°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831655335
Dimensions7.82 × 7.74 × 4.57 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.82 mm7.74 mm1.68 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831655335
Side View
Table 59.0%Crown 32.9°Girdle: MediumPavilion 40.4°CuletDepth 58.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £332 GBP|Low: £173 GBP|High: £910 GBP|Avg: £541 GBP|-0.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Reve Diamonds
October 29, 2026
Retailer 4£173 GBP
Retailer 5£330 GBP
Retailer 1£332 GBP
Retailer 3£617 GBP
Retailer 2£896 GBP
Reve Diamonds£910 GBP

26 data points across 6 retailers

9 retailers£155 GBP to £910 GBP

A
Cheapest Retailer
-
£155 GBP
$206 USD
A
Retailer 2
-
£173 GBP
$230 USD
View
Final sale: no returns
A
Retailer 3
-
£191 GBP
$255 USD
View
B+
Retailer 4
-
£330 GBP
$439 USD
View
A
Retailer 5
-
£332 GBP
View
B+
Retailer 6
-
£615 GBP
$819 USD
View
B
Retailer 7
-
£617 GBP
$822 USD
View
B
Retailer 8
-
£896 GBP
View
Most Expensive
B
Reve Diamonds
212EB783E · Oct 28
£910 GBP
$1,211 USD
View
8 more retailers have this diamond
Prices start from £155 GBPSave up to £755 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
1.68ct Round
£155 GBP