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Round|Lab Grown|IGI

1.89ct F SI2 Round Lab Grown Diamond

VG • F/SI2 • IGI LG763668399

Shape and cutting style on the report: Round brilliant

Certificate IGI LG763668399

Diamond specifications and retailer prices

From £173 GBP
$232 USD
As of November 1, 2026
Save £805 GBP (82%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £978 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.89ct lab-grown round diamond

This 1.89ct lab-grown round sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI LG763668399 or 763668399. Listed at 14 retailers as of October 31, 2026, with prices from £173 to £978, a £805 spread on the same certified stone. Brilliant Earth lists it at £978. 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

1.89
Carat
F
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle36.7°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG763668399
Dimensions7.79 × 7.74 × 4.99 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.79 mm7.74 mm1.89 ctF / SI2
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG763668399
Side View
Table 55.0%Crown 36.7°Girdle: MED-STKPavilion 41°Culet: NoneDepth 64.2%

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: £978 GBP|Low: £166 GBP|High: £1,127 GBP|Avg: £487 GBP|-13.2%
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 1, 2026
Retailer 11£173 GBP
Retailer 12£194 GBP
Retailer 5£215 GBP
Retailer 8£354 GBP
Retailer 3£364 GBP
Retailer 6£371 GBP
Retailer 7£401 GBP
Retailer 13£414 GBP
Retailer 10£558 GBP
Retailer 9£649 GBP
Retailer 2£861 GBP
Retailer 4£906 GBP
Brilliant Earth£978 GBP

35 data points across 13 retailers

14 retailers£173 GBP to £978 GBP

A
Cheapest Retailer
-
£173 GBP
$232 USD
A
Retailer 2
-
£194 GBP
$260 USD
View
Final sale: no returns
Retailer 3
-
£215 GBP
$288 USD
View
Price last confirmed 7 days ago
B+
Retailer 4
-
£354 GBP
€452 EUR
View
B+
Retailer 5
-
£364 GBP
$488 USD
View
A
Retailer 6
-
£371 GBP
View
B+
Retailer 7
-
£401 GBP
View
B+
Retailer 8
-
£414 GBP
$555 USD
View
B+
Retailer 9
-
£558 GBP
$747 USD
View
Retailer 10
-
£641 GBP
$859 USD
View
Price last confirmed 47 days ago
B
Retailer 11
-
£649 GBP
$870 USD
View
B
Retailer 12
-
£861 GBP
View
B
Retailer 13
-
£906 GBP
$1,214 USD
View
Most Expensive
B
Brilliant Earth
19891666A · Oct 31
£978 GBP
$1,310 USD
View
13 more retailers have this diamond
Prices start from £173 GBPSave up to £805 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
1.89ct Round
£173 GBP