CaratHunter
Plans
Round|Lab Grown|IGI

1.09ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG775620770

Shape and cutting style on the report: Round brilliant

Certificate IGI LG775620770

Diamond specifications and retailer prices

From €128 EUR
$143 USD
As of October 26, 2026
Save €617 EUR (83%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: €745 EUR at MOH London · As of October 26, 2026
View at MOH London

About this 1.09ct lab-grown round diamond

This 1.09ct 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 LG775620770 or 775620770. Listed at 17 retailers as of October 26, 2026, with prices from €128 to €745, a €617 spread on the same certified stone. MOH London lists it at €745. 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

1.09
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG775620770
Dimensions6.59 × 6.64 × 4.05 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.59 mm6.64 mm1.09 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG775620770
Side View
Table 57.0%Crown 33.7°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 61.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 26
Current: €745 EUR|Low: €128 EUR|High: €796 EUR|Avg: €352 EUR|-5.3%
MOH London
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
Retailer 17
October 31, 2026
Retailer 4€128 EUR
Retailer 17€143 EUR
Retailer 16€149 EUR
Retailer 3€159 EUR
Retailer 14€183 EUR
Retailer 2€271 EUR
Retailer 13€271 EUR
Retailer 15€287 EUR
Retailer 5€296 EUR
Retailer 8€332 EUR
Retailer 7€381 EUR
Retailer 9€385 EUR
Retailer 10€396 EUR
Retailer 12€434 EUR
Retailer 11€465 EUR
Retailer 6€511 EUR
MOH London€745 EUR

40 data points across 17 retailers

17 retailers€128 EUR to €745 EUR

A
Cheapest Retailer
-
€128 EUR
$143 USD
A
Retailer 2
-
€149 EUR
$166 USD
View
Retailer 3
-
€159 EUR
$178 USD
View
Price last confirmed 8 days ago
A
Retailer 4
-
€183 EUR
HK$1,600 HKD
View
A
Retailer 5
-
€271 EUR
View
A
Retailer 6
-
€271 EUR
£238 GBP
View
A
Retailer 7
-
€287 EUR
$321 USD
View
B+
Retailer 8
-
€296 EUR
$331 USD
View
Retailer 9
-
€332 EUR
£292 GBP
View
Price last confirmed 16 days ago
B+
Retailer 10
-
€381 EUR
$426 USD
View
Retailer 11
-
€385 EUR
$430 USD
View
Price last confirmed 24 days ago
B+
Retailer 12
-
€396 EUR
$442 USD
View
B+
Retailer 13
-
€418 EUR
A$718 AUD
View
B+
Retailer 14
-
€434 EUR
SGD 655 SGD
View
B+
Retailer 15
-
€465 EUR
$520 USD
View
Retailer 16
-
€511 EUR
$571 USD
View
Price last confirmed 7 days ago
Most Expensive
B
MOH London
LG775620770 · Oct 26
€745 EUR
£655 GBP
View
16 more retailers have this diamond
Prices start from €128 EURSave up to €617 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
1.09ct Round
€128 EUR