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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 €318 EUR
As of October 31, 2026
Save €336 EUR (51%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: €653 EUR at Brilliant Earth · As of November 1, 2026
View at Brilliant Earth

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 2 retailers as of October 31, 2026, with prices from €318 to €653, a €336 spread on the same certified stone. Brilliant Earth lists it at €653. 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 31
Current: €653 EUR|Low: €258 EUR|High: €671 EUR|Avg: €414 EUR|-2.7%
Brilliant Earth
Retailer 2
Retailer 3
November 1, 2026
Retailer 3€258 EUR
Retailer 2€318 EUR
Brilliant Earth€653 EUR

15 data points across 3 retailers

2 retailers€318 EUR to €653 EUR

B+
Cheapest Retailer
-
€318 EUR
Most Expensive
Brilliant Earth
16335471A · Nov 1
€653 EUR
$730 USD
View
1 more retailer has this diamond
Prices start from €318 EURSave up to €336 EUR

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
€318 EUR