CaratHunter
Plans
Round|Lab Grown|IGI

1.73ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG678532452

Shape and cutting style on the report: Round brilliant

Certificate IGI LG678532452

Diamond specifications and retailer prices

From £413 GBP
$554 USD
As of October 29, 2026
Save £1,202 GBP (74%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £1,615 GBP at Diamond Exchange Canada · As of October 30, 2026
View at Diamond Exchange Canada

About this 1.73ct lab-grown round diamond

This 1.73ct 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 LG678532452 or 678532452. Listed at 4 retailers as of October 29, 2026, with prices from £413 to £1,615, a £1,202 spread on the same certified stone. Diamond Exchange Canada lists it at £1,615. 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

1.73
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG678532452
Dimensions7.70 × 7.70 × 4.80 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 mm7.70 mm1.73 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG678532452
Side View
Table 55.0%Crown 35°Girdle: MediumPavilion 41°Culet: NoneDepth 62.3%

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: £1,615 GBP|Low: £413 GBP|High: £3,232 GBP|Avg: £1,481 GBP
Diamond Exchange Canada
Retailer 2
Retailer 3
Retailer 4
October 6, 2026
Retailer 3£413 GBP
Retailer 2£684 GBP
Diamond Exchange Canada£1,615 GBP
Retailer 4£3,232 GBP

3 data points across 4 retailers

4 retailers£413 GBP to £1,615 GBP

A
Cheapest Retailer
-
£413 GBP
$554 USD
B
Retailer 2
-
£684 GBP
$917 USD
View
Most Expensive
B
Diamond Exchange Canada
1987516173 · Oct 30
£1,615 GBP
CA$3,006 CAD
View
2 more retailers have this diamond
Prices start from £413 GBPSave up to £1,202 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
1.73ct Round
£413 GBP