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Round|Lab Grown|IGI

1.72ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG455032750

Shape and cutting style on the report: Round brilliant

Certificate IGI LG455032750

Diamond specifications and retailer prices

From £196 GBP
$263 USD
As of October 30, 2026
Save £684 GBP (78%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £881 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.72ct lab-grown round diamond

This 1.72ct 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 LG455032750 or 455032750. Listed at 15 retailers as of October 29, 2026, with prices from £196 to £881, a £684 spread on the same certified stone. Brilliant Earth lists it at £881. 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

1.72
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG455032750
Dimensions7.66 × 7.62 × 4.76 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by high pressure high temperature process (HPHT).
Top View
7.66 mm7.62 mm1.72 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG455032750
Side View
Table 59.5%Crown 35.6°GirdlePavilion 41.3°Culet: NoneDepth 62.4%

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: Oct 30
Current: £881 GBP|Low: £196 GBP|High: £1,127 GBP|Avg: £495 GBP|-21.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 11£196 GBP
Retailer 4£243 GBP
Retailer 12£295 GBP
Retailer 7£342 GBP
Retailer 3£366 GBP
Retailer 5£394 GBP
Retailer 2£411 GBP
Retailer 9£416 GBP
Retailer 8£574 GBP
Retailer 10£740 GBP
Retailer 6£876 GBP
Brilliant Earth£881 GBP

43 data points across 12 retailers

15 retailers£196 GBP to £881 GBP

Retailer 1
-
£196 GBP
$262 USD
Price last confirmed 38 days ago
A
Retailer 2
-
£196 GBP
$263 USD
View
Final sale: no returns
Retailer 3
-
£227 GBP
$304 USD
View
Price last confirmed 38 days ago
Retailer 4
-
£239 GBP
$320 USD
View
Price last confirmed 35 days ago
B+
Retailer 5
-
£295 GBP
$395 USD
View
Retailer 6
-
£342 GBP
View
Price last confirmed 13 days ago
A
Retailer 7
-
£394 GBP
€503 EUR
View
A
Retailer 8
-
£411 GBP
View
A
Retailer 9
-
£416 GBP
$557 USD
View
B+
Retailer 10
-
£574 GBP
$769 USD
View
Retailer 11
-
£679 GBP
$910 USD
View
Price last confirmed 38 days ago
B
Retailer 12
-
£740 GBP
$992 USD
View
Retailer 13
-
£778 GBP
$1,043 USD
View
Price last confirmed 39 days ago
B
Retailer 14
-
£876 GBP
View
Most Expensive
B
Brilliant Earth
14242415A · Oct 29
£881 GBP
$1,180 USD
View
14 more retailers have this diamond
Prices start from £196 GBPSave up to £684 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
1.72ct Round
£196 GBP