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Radiant|Lab Grown|IGI

1.05ct D SI1 Radiant Lab Grown Diamond

GD • D/SI1 • IGI LG681543680

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG681543680

Diamond specifications and retailer prices

From £224 GBP
$300 USD
As of October 30, 2026
Save £1,075 GBP (83%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,299 GBP at Do Amore Diamonds · As of November 1, 2026
View at Do Amore Diamonds

About this 1.05ct lab-grown radiant diamond

This 1.05ct lab-grown radiant sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG681543680 or 681543680. Listed at 7 retailers as of October 30, 2026, with prices from £224 to £1,299, a £1,075 spread on the same certified stone. Do Amore Diamonds lists it at £1,299. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.05
Carat
D
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishVery Good
SymmetryGood
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG681543680
Dimensions7.22 × 5.01 × 3.31 mm
L/W Ratio1.44
Culet sizePointed
Cert comments
Pre-existing laser inscription on girdle. As Grown - No indication of post-growth treatment.. This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process.
Top View
7.22 mm5.01 mm1.05 ctD / SI1
OriginLab Grown
CutGood
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateIGI LG681543680
Side View
Table 75.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 66.1%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £1,299 GBP|Low: £224 GBP|High: £1,299 GBP|Avg: £569 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 6£224 GBP
Retailer 4£331 GBP
Retailer 5£369 GBP
Retailer 7£407 GBP
Retailer 3£429 GBP
Retailer 8£659 GBP
Retailer 2£850 GBP
Do Amore Diamonds£1,299 GBP

13 data points across 8 retailers

7 retailers£224 GBP to £1,299 GBP

B+
Cheapest Retailer
-
£224 GBP
$300 USD
B
Retailer 2
-
£331 GBP
$444 USD
View
B
Retailer 3
-
£369 GBP
$495 USD
View
Retailer 4
-
£429 GBP
$575 USD
View
Price last confirmed 11 days ago
C
Retailer 5
-
£661 GBP
View
C
Retailer 6
-
£850 GBP
View
Most Expensive
C
Do Amore Diamonds
7-1678665 · Nov 1
£1,299 GBP
$1,740 USD
View
6 more retailers have this diamond
Prices start from £224 GBPSave up to £1,075 GBP

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.

B+
1.05ct Radiant
£224 GBP