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Marquise|Lab Grown|UNKNOWN

1.05ct E SI1 Marquise Lab Grown Diamond

ID • E/SI1 • UNKNOWN 231156074

Certificate UNKNOWN 231156074

Diamond specifications and retailer prices

From £112 GBP
As of November 4, 2026
Save £337 GBP (75%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £449 GBP at NZ Jewellers · As of November 4, 2026
View at NZ Jewellers

About this 1.05ct lab-grown marquise diamond

This 1.05ct lab-grown marquise sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by UNKNOWN 231156074. Listed at 4 retailers as of November 4, 2026, with prices from £112 to £449, a £337 spread on the same certified stone. NZ Jewellers lists it at £449. 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

1.05
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabUNKNOWN
CertificateUNKNOWN 231156074
Dimensions10.92 × 5.28 × 3.24 mm
L/W Ratio2.07
Top View
10.92 mm5.28 mm1.05 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateUNKNOWN 231156074
Side View
Table 62.0%CrownGirdlePavilionCuletDepth 61.4%

Caratlytics Score

How it works →
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: Nov 4
Current: £449 GBP|Low: £108 GBP|High: £449 GBP|Avg: £198 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 16, 2026
Retailer 4£112 GBP
Retailer 3£131 GBP
Retailer 2£140 GBP
Retailer 5£189 GBP
NZ Jewellers£449 GBP

9 data points across 5 retailers

4 retailers£112 GBP to £449 GBP

A
Cheapest Retailer
-
£112 GBP
B+
Retailer 2
-
£131 GBP
View
B+
Retailer 3
-
£140 GBP
View
Most Expensive
B
NZ Jewellers
9e6fdc38-c15b-49dd-acbc-ccadeabe5531 · Nov 4
£449 GBP
$604 USD
View
3 more retailers have this diamond
Prices start from £112 GBPSave up to £337 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.

A
1.05ct Marquise
£112 GBP