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Round|Lab Grown|IGI

1.00ct E SI2 Round Lab Grown Diamond

ID • E/SI2 • IGI LG472170717

Shape and cutting style on the report: Round brilliant

Certificate IGI LG472170717

Diamond specifications and retailer prices

From £486 GBP
$647 USD
As of October 29, 2026
Save £435 GBP (47%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,584 GBP at NZ Jewellers · As of October 27, 2026
View at NZ Jewellers

About this 1ct lab-grown round diamond

This 1ct lab-grown round sits in the classic one-carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG472170717 or 472170717. Listed at 11 retailers as of October 28, 2026, with a 89% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.00
Carat
E
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG472170717
Dimensions6.45 × 6.43 × 3.88 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.45 mm6.43 mm1.00 ctE / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG472170717
Side View
Table 58.5%Crown 34°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 60.2%

Caratlytics Score

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

Price History

Last verified: Oct 29
Current: £1,584 GBP|Low: £387 GBP|High: £2,402 GBP|Avg: £930 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 5£486 GBP
Retailer 10£529 GBP
Retailer 9£544 GBP
Retailer 7£563 GBP
Retailer 6£571 GBP
Retailer 2£895 GBP
Retailer 8£921 GBP
Retailer 4£1,440 GBP
NZ Jewellers£1,584 GBP
Retailer 3£2,377 GBP

42 data points across 10 retailers

11 retailers£486 GBP to £921 GBP

B+
Cheapest Retailer
-
£486 GBP
$647 USD
B
Retailer 2
-
£529 GBP
$704 USD
View
B
Retailer 3
-
£544 GBP
$724 USD
View
Final sale: no returns
Retailer 4
-
£563 GBP
$750 USD
View
Price last confirmed 13 days ago
B
Retailer 5
-
£563 GBP
$750 USD
View
B
Retailer 6
-
£571 GBP
$760 USD
View
B
Retailer 7
-
£895 GBP
View
B
Retailer 8
-
£921 GBP
$1,226 USD
View
Retailer 9
-
£1,440 GBP
$1,917 USD
View
Price under review
Most Expensive
NZ Jewellers
415f9937-45e6-4b2c-89b4-da4c0c4a1a1d · Oct 27
£1,584 GBP
$2,110 USD
View
Price under review
9 more retailers have this diamond
Prices start from £486 GBPSave up to £435 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+
1.00ct Round
£486 GBP