CaratHunter
Plans
Round|Lab Grown|IGI

1.21ct H SI1 Round Lab Grown Diamond

ID • H/SI1 • IGI LG817652948

Shape and cutting style on the report: Round brilliant

Certificate IGI LG817652948

Diamond specifications and retailer prices

From €203 EUR
As of November 4, 2026
Save €278 EUR (58%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: €928 EUR at Reve Diamonds · As of October 25, 2026
View at Reve Diamonds

About this 1.21ct lab-grown round diamond

This 1.21ct lab-grown round sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG817652948 or 817652948. Listed at 16 retailers as of November 4, 2026, with a 137% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.21
Carat
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle34.9°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG817652948
Dimensions6.86 × 6.82 × 4.14 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.86 mm6.82 mm1.21 ctH / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG817652948
Side View
Table 60.0%Crown 34.9°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 60.5%

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: Nov 4
Current: €264 EUR|Low: €135 EUR|High: €1,269 EUR|Avg: €486 EUR|-22.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Reve Diamonds
November 6, 2026
Retailer 10€135 EUR
Retailer 9€203 EUR
Retailer 4€233 EUR
Retailer 1€264 EUR
Retailer 7€344 EUR
Retailer 6€354 EUR
Retailer 5€365 EUR
Retailer 2€459 EUR
Retailer 8€481 EUR
Retailer 11€533 EUR
Retailer 3€790 EUR
Reve Diamonds€928 EUR

34 data points across 12 retailers

16 retailers€203 EUR to €481 EUR

Retailer 1
-
€163 EUR
Price last confirmed 27 days ago
Retailer 2
-
€190 EUR
View
Price last confirmed 28 days ago
Retailer 3
-
€202 EUR
View
Price last confirmed 27 days ago
B+
Retailer 4
-
€203 EUR
View
A
Retailer 5
-
€233 EUR
View
A
Retailer 6
-
€264 EUR
View
A
Retailer 7
-
€344 EUR
View
A
Retailer 8
-
€354 EUR
View
A
Retailer 9
-
€365 EUR
View
Retailer 10
-
€401 EUR
View
Price last confirmed 11 days ago
Retailer 11
-
€459 EUR
View
Price last confirmed 11 days ago
A
Retailer 12
-
€481 EUR
View
Retailer 13
-
€533 EUR
View
Price last confirmed 10 days ago
Retailer 14
-
€651 EUR
View
Price last confirmed 28 days ago
Retailer 15
-
€790 EUR
View
Price last confirmed 16 days ago
Most Expensive
Reve Diamonds
CA45F42F7 · Oct 25
€928 EUR
$1,041 USD
View
Price last confirmed 12 days ago
15 more retailers have this diamond
Prices start from €203 EURSave up to €278 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
1.21ct Round
€203 EUR