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Round|Lab Grown|IGI

1.00ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG685511643

Shape and cutting style on the report: Round brilliant

Certificate IGI LG685511643

Diamond specifications and retailer prices

From €127 EUR
$142 USD
As of October 29, 2026
Save €777 EUR (86%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: €904 EUR at Reve Diamonds · As of October 30, 2026
View at Reve Diamonds

About this 1ct lab-grown round diamond

This 1ct lab-grown round sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG685511643 or 685511643. Listed at 22 retailers as of October 29, 2026, with prices from €127 to €904, a €777 spread on the same certified stone. Reve Diamonds lists it at €904. 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
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG685511643
Dimensions6.47 × 6.44 × 3.90 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
6.47 mm6.44 mm1.00 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG685511643
Side View
Table 59.0%Crown 34.5°Girdle: THN-MEDPavilion 40.7°Culet: NoneDepth 60.4%

Caratlytics Score

How it works →
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 29
Current: €271 EUR|Low: €94 EUR|High: €904 EUR|Avg: €371 EUR|+7.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Reve Diamonds
October 30, 2026
Retailer 6€127 EUR
Retailer 11€141 EUR
Retailer 12€148 EUR
Retailer 3€158 EUR
Retailer 16€158 EUR
Retailer 14€241 EUR
Retailer 1€271 EUR
Retailer 2€294 EUR
Retailer 10€311 EUR
Retailer 15€377 EUR
Retailer 8€412 EUR
Retailer 4€422 EUR
Retailer 13€429 EUR
Retailer 7€508 EUR
Retailer 5€558 EUR
Retailer 9€743 EUR
Reve Diamonds€904 EUR

43 data points across 17 retailers

22 retailers€127 EUR to €904 EUR

Retailer 1
-
€126 EUR
$141 USD
Price last confirmed 38 days ago
A
Retailer 2
-
€127 EUR
$142 USD
View
A
Retailer 3
-
€141 EUR
$158 USD
View
Final sale: no returns
A
Retailer 4
-
€148 EUR
$165 USD
View
Retailer 5
-
€155 EUR
$173 USD
View
Price last confirmed 38 days ago
A
Retailer 6
-
€158 EUR
$177 USD
View
A
Retailer 7
-
€158 EUR
$177 USD
View
A
Retailer 8
-
€241 EUR
$269 USD
View
A
Retailer 9
-
€271 EUR
£238 GBP
View
B+
Retailer 10
-
€294 EUR
$328 USD
View
B+
Retailer 11
-
€311 EUR
View
Retailer 12
-
€362 EUR
$405 USD
View
Price last confirmed 88 days ago
B+
Retailer 13
-
€377 EUR
$421 USD
View
B+
Retailer 14
-
€412 EUR
$460 USD
View
B+
Retailer 15
-
€422 EUR
$472 USD
View
B+
Retailer 16
-
€429 EUR
A$738 AUD
View
Retailer 17
-
€482 EUR
$538 USD
View
Price last confirmed 38 days ago
Retailer 18
-
€504 EUR
$563 USD
View
Price last confirmed 39 days ago
B
Retailer 19
-
€508 EUR
$568 USD
View
B
Retailer 20
-
€558 EUR
$623 USD
View
B
Retailer 21
-
€743 EUR
£654 GBP
View
Most Expensive
B
Reve Diamonds
FD1186601 · Oct 30
€904 EUR
$1,010 USD
View
21 more retailers have this diamond
Prices start from €127 EURSave up to €777 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.

A
1.00ct Round
€127 EUR