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Radiant|Lab Grown|IGI

1.72ct D SI1 Radiant Lab Grown Diamond

GD • D/SI1

Diamond specifications and retailer prices

From £257 GBP
As of October 30, 2026
Save £769 GBP (75%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £1,026 GBP at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 1.72ct lab-grown radiant diamond

This 1.72ct lab-grown radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI. Listed at 3 retailers as of October 28, 2026, with prices from £257 to £1,026, a £769 spread on the same certified stone. Rare Carat lists it at £1,026. 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

1.72
Carat
D
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions8.76 × 5.89 × 3.93 mm
L/W Ratio1.49
Top View
8.76 mm5.89 mm1.72 ctD / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 62.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 66.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £1,026 GBP|Low: £253 GBP|High: £1,037 GBP|Avg: £546 GBP|-1.1%
Rare Carat
Retailer 2
Retailer 3
October 30, 2026
Retailer 2£257 GBP
Retailer 3£423 GBP
Rare Carat£1,026 GBP

13 data points across 3 retailers

3 retailers£257 GBP to £1,026 GBP

B+
Cheapest Retailer
-
£257 GBP
B+
Retailer 2
-
£423 GBP
$567 USD
View
Most Expensive
C
Rare Carat
E41I-50C_l_629439991 · Oct 28
£1,026 GBP
$1,375 USD
View
2 more retailers have this diamond
Prices start from £257 GBPSave up to £769 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.

B+
1.72ct Radiant
£257 GBP