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Round|Lab Grown|IGI

1.00ct H SI1 Round Lab Grown Diamond

VG • H/SI1 • IGI LG257716985

Shape and cutting style on the report: Round brilliant

Certificate IGI LG257716985

Diamond specifications and retailer prices

From £268 GBP
€339 EUR
As of October 29, 2026
1 retailer carries this diamond
Only listing: £268 GBP at Yorxs
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Yorxs

About this 1ct lab-grown round diamond

This 1ct lab-grown round sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG257716985 or 257716985. Listed at a single retailer as of October 29, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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

1.00
Carat
H
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG257716985
Dimensions6.41 × 6.38 × 3.86 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeMedium
Cert comments
This Chemical Vapor Deposition (CVD) laboratory grown diamond is classified as Type II.
Top View
6.41 mm6.38 mm1.00 ctH / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG257716985
Side View
Table 63.5%Crown 33.3°Girdle: STK-THKPavilion 41°Culet: MediumDepth 60.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 29
Current: £217 GBP|Low: £217 GBP|High: £564 GBP|Avg: £349 GBP
Retailer 1
Retailer 2
Yorxs
October 29, 2026
Retailer 1£217 GBP
Yorxs£268 GBP
Retailer 2£564 GBP

13 data points across 3 retailers

1 retailer

B+
Yorxs
511553288 · Oct 29
£268 GBP
€339 EUR
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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+
1.00ct Round
£268 GBP