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Round|Lab Grown|IGI

1.31ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG771657198

Shape and cutting style on the report: Round brilliant

Certificate IGI LG771657198

Diamond specifications and retailer prices

From €140 EUR
$157 USD
As of October 26, 2026
Save €802 EUR (85%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: €942 EUR at Reve Diamonds · As of October 25, 2026
View at Reve Diamonds

About this 1.31ct lab-grown round diamond

This 1.31ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG771657198 or 771657198. Listed at 19 retailers as of October 25, 2026, with prices from €140 to €942, a €802 spread on the same certified stone. Reve Diamonds lists it at €942. 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

1.31
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG771657198
Dimensions7.05 × 7.02 × 4.33 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.05 mm7.02 mm1.31 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG771657198
Side View
Table 58.0%Crown 33.3°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 61.6%

Caratlytics Score

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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 26
Current: €462 EUR|Low: €136 EUR|High: €1,036 EUR|Avg: €419 EUR
Retailer 1
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Retailer 17
Reve Diamonds
October 31, 2026
Retailer 6€140 EUR
Retailer 7€156 EUR
Retailer 11€162 EUR
Retailer 4€174 EUR
Retailer 9€234 EUR
Retailer 12€299 EUR
Retailer 15€302 EUR
Retailer 16€305 EUR
Retailer 10€383 EUR
Retailer 5€435 EUR
Retailer 14€437 EUR
Retailer 1€462 EUR
Retailer 3€467 EUR
Retailer 13€535 EUR
Retailer 2€558 EUR
Retailer 8€607 EUR
Retailer 17€812 EUR
Reve Diamonds€942 EUR

36 data points across 18 retailers

19 retailers€140 EUR to €942 EUR

A
Cheapest Retailer
-
€140 EUR
$157 USD
A
Retailer 2
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€156 EUR
$175 USD
View
Final sale: no returns
A
Retailer 3
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€162 EUR
$182 USD
View
A
Retailer 4
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€174 EUR
$195 USD
View
B+
Retailer 5
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€234 EUR
$262 USD
View
A
Retailer 6
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€299 EUR
View
A
Retailer 7
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€302 EUR
£267 GBP
View
A
Retailer 8
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€305 EUR
£270 GBP
View
A
Retailer 9
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€383 EUR
$430 USD
View
Retailer 10
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€432 EUR
$485 USD
View
Price last confirmed 13 days ago
A
Retailer 11
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€435 EUR
$488 USD
View
A
Retailer 12
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€437 EUR
$490 USD
View
B+
Retailer 13
-
€462 EUR
A$798 AUD
View
B+
Retailer 14
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€467 EUR
$524 USD
View
B+
Retailer 15
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€535 EUR
$600 USD
View
B+
Retailer 16
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€558 EUR
$626 USD
View
B+
Retailer 17
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€607 EUR
$681 USD
View
B
Retailer 18
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€812 EUR
£717 GBP
View
Most Expensive
B
Reve Diamonds
1E17ECC5F · Oct 25
€942 EUR
$1,056 USD
View
18 more retailers have this diamond
Prices start from €140 EURSave up to €802 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
1.31ct Round
€140 EUR