Heart|Lab Grown|UNKNOWN

1.00ct D SI1 Heart Lab Grown Diamond

ID • D/SI1 • UNKNOWN 231156201

Certificate UNKNOWN 231156201

Diamond specifications and retailer prices

From £112 GBP
$150 USD
As of October 30, 2026
Save £335 GBP (75%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £447 GBP at NZ Jewellers · As of November 1, 2026
View at NZ Jewellers

About this 1ct lab-grown heart diamond

This 1ct lab-grown heart 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 UNKNOWN 231156201. Listed at 4 retailers as of October 30, 2026, with prices from £112 to £447, a £335 spread on the same certified stone. NZ Jewellers lists it at £447. 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

1.00
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabUNKNOWN
CertificateUNKNOWN 231156201
Dimensions6.12 × 7.03 × 4.01 mm
L/W Ratio1.15
Top View
6.12 mm7.03 mm1.00 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateUNKNOWN 231156201
Side View
Table 67.0%CrownGirdlePavilionCuletDepth 57.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: £447 GBP|Low: £107 GBP|High: £447 GBP|Avg: £193 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 8, 2026
Retailer 2£112 GBP
Retailer 4£130 GBP
Retailer 3£139 GBP
Retailer 5£188 GBP
NZ Jewellers£447 GBP

6 data points across 5 retailers

4 retailers£112 GBP to £447 GBP

A
Cheapest Retailer
-
£112 GBP
$150 USD
B+
Retailer 2
-
£130 GBP
$174 USD
View
B+
Retailer 3
-
£139 GBP
$186 USD
View
Most Expensive
B
NZ Jewellers
35a717a2-acd5-438a-ab0d-3b0fad9ddfb7 · Nov 1
£447 GBP
$599 USD
View
3 more retailers have this diamond
Prices start from £112 GBPSave up to £335 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
1.00ct Heart
£112 GBP