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Round|Lab Grown|IGI

1.89ct D SI1 Round Lab Grown Diamond

ID • D/SI1

Diamond specifications and retailer prices

From £392 GBP
$522 USD
As of October 29, 2026
Save £1,256 GBP (76%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £1,648 GBP at The Diamond Guys · As of October 30, 2026
View at The Diamond Guys

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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI. Listed at 3 retailers as of October 29, 2026, with prices from £392 to £1,648, a £1,256 spread on the same certified stone. The Diamond Guys lists it at £1,648. 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

1.89
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions7.96 × 7.99 × 4.86 mm
L/W Ratio1.00
Top View
7.96 mm7.99 mm1.89 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 58.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 60.9%

Caratlytics Score

How it works →
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: Oct 29
Current: £1,142 GBP|Low: £392 GBP|High: £1,648 GBP|Avg: £1,119 GBP|-23.3%
Retailer 1
Retailer 2
The Diamond Guys
October 8, 2026
Retailer 2£392 GBP
Retailer 1£1,142 GBP
The Diamond Guys£1,648 GBP

2 data points across 3 retailers

3 retailers£392 GBP to £1,648 GBP

A
Cheapest Retailer
-
£392 GBP
$522 USD
B
Retailer 2
-
£1,142 GBP
CA$2,113 CAD
View
Most Expensive
C
The Diamond Guys
1932674242 · Oct 30
£1,648 GBP
$2,195 USD
View
2 more retailers have this diamond
Prices start from £392 GBPSave up to £1,256 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
£392 GBP