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Round|Lab Grown|IGI

1.67ct G SI1 Round Lab Grown Diamond

VG • G/SI1 • IGI LG754510366

Shape and cutting style on the report: Round brilliant

Certificate IGI LG754510366

Diamond specifications and retailer prices

From £148 GBP
$199 USD
As of November 1, 2026
Save £992 GBP (87%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,140 GBP at Brilliant Earth · As of November 1, 2026
View at Brilliant Earth

About this 1.67ct lab-grown round diamond

This 1.67ct lab-grown round sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG754510366 or 754510366. Listed at 14 retailers as of November 1, 2026, with prices from £148 to £1,140, a £992 spread on the same certified stone. Brilliant Earth lists it at £1,140. 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

1.67
Carat
G
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle41.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754510366
Dimensions7.52 × 7.44 × 4.76 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.52 mm7.44 mm1.67 ctG / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754510366
Side View
Table 58.0%Crown 34.1°Girdle: STK-THKPavilion 41.7°Culet: NoneDepth 63.6%

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: £1,140 GBP|Low: £142 GBP|High: £1,140 GBP|Avg: £361 GBP
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
November 2, 2026
Retailer 6£148 GBP
Retailer 13£172 GBP
Retailer 8£184 GBP
Retailer 5£186 GBP
Retailer 4£313 GBP
Retailer 3£321 GBP
Retailer 2£337 GBP
Retailer 12£380 GBP
Retailer 11£402 GBP
Retailer 9£592 GBP
Retailer 10£595 GBP
Retailer 7£862 GBP
Brilliant Earth£1,140 GBP

41 data points across 13 retailers

14 retailers£148 GBP to £1,140 GBP

A
Cheapest Retailer
-
£148 GBP
$199 USD
A
Retailer 2
-
£172 GBP
$231 USD
View
A
Retailer 3
-
£184 GBP
$247 USD
View
Retailer 4
-
£186 GBP
$250 USD
View
Price last confirmed 8 days ago
A
Retailer 5
-
£313 GBP
€400 EUR
View
B+
Retailer 6
-
£321 GBP
$431 USD
View
B+
Retailer 7
-
£337 GBP
View
B+
Retailer 8
-
£380 GBP
$510 USD
View
B+
Retailer 9
-
£402 GBP
$539 USD
View
Retailer 10
-
£559 GBP
$750 USD
View
B
Retailer 11
-
£592 GBP
$795 USD
View
B+
Retailer 12
-
£595 GBP
$798 USD
View
B
Retailer 13
-
£862 GBP
View
Most Expensive
B
Brilliant Earth
18038583A · Nov 1
£1,140 GBP
$1,530 USD
View
13 more retailers have this diamond
Prices start from £148 GBPSave up to £992 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
1.67ct Round
£148 GBP