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Round|Lab Grown|IGI

1.23ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG759507271

Shape and cutting style on the report: Round brilliant

Certificate IGI LG759507271

Diamond specifications and retailer prices

From €176 EUR
As of November 5, 2026
Save €879 EUR (83%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: €1,054 EUR at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

About this 1.23ct lab-grown round diamond

This 1.23ct lab-grown round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG759507271 or 759507271. Listed at 21 retailers as of November 5, 2026, with prices from €176 to €1,054, a €879 spread on the same certified stone. Reve Diamonds lists it at €1,054. 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

1.23
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG759507271
Dimensions6.91 × 6.88 × 4.21 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
6.91 mm6.88 mm1.23 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG759507271
Side View
Table 60.0%Crown 33.7°Girdle: MediumPavilion 41.4°Culet: NoneDepth 61.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: €427 EUR|Low: €174 EUR|High: €1,054 EUR|Avg: €476 EUR|-0.8%
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
November 6, 2026
Retailer 7€176 EUR
Retailer 5€196 EUR
Retailer 15€203 EUR
Retailer 2€217 EUR
Retailer 3€217 EUR
Retailer 4€378 EUR
Retailer 10€390 EUR
Retailer 9€413 EUR
Retailer 1€427 EUR
Retailer 16€437 EUR
Retailer 14€468 EUR
Retailer 11€579 EUR
Retailer 8€699 EUR
Retailer 13€701 EUR
Retailer 6€747 EUR
Retailer 12€1,013 EUR
Reve Diamonds€1,054 EUR

33 data points across 17 retailers

21 retailers€176 EUR to €1,054 EUR

A
Cheapest Retailer
-
€176 EUR
A
Retailer 2
-
€196 EUR
View
Final sale: no returns
A
Retailer 3
-
€203 EUR
View
Retailer 4
-
€217 EUR
View
Price last confirmed 12 days ago
A
Retailer 5
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€217 EUR
View
B+
Retailer 6
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€355 EUR
View
B+
Retailer 7
-
€378 EUR
View
B+
Retailer 8
-
€390 EUR
View
B+
Retailer 9
-
€413 EUR
View
B+
Retailer 10
-
€427 EUR
View
B+
Retailer 11
-
€437 EUR
View
B+
Retailer 12
-
€437 EUR
View
B+
Retailer 13
-
€468 EUR
View
B
Retailer 14
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€579 EUR
View
B
Retailer 15
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€594 EUR
View
Retailer 16
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€693 EUR
View
Price last confirmed 46 days ago
B
Retailer 17
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€699 EUR
View
B
Retailer 18
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€701 EUR
View
B
Retailer 19
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€747 EUR
View
B
Retailer 20
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€1,013 EUR
View
Most Expensive
B
Reve Diamonds
932605E8E · Nov 6
€1,054 EUR
$1,183 USD
View
20 more retailers have this diamond
Prices start from €176 EURSave up to €879 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
1.23ct Round
€176 EUR