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Imperial Star Gems

Lab-grown loose diamonds

The same material, a different origin, stated openly on every report. Filter to the specification you need and enquire on any stone.

What lab-grown actually means

What it is

Carbon in the same cubic lattice as a mined diamond, with the same hardness, refractive index and dispersion. It is a diamond by material definition, not a substitute for one.

How it is made

Either by chemical vapour deposition, where carbon is layered onto a seed in a plasma chamber, or by high pressure and high temperature, which reproduces mantle conditions directly. Weeks, rather than a geological age.

How to tell

Not by eye, and not with a thermal probe. Laboratories identify grown material by its growth structure and trace elements, and every grown stone is laser-inscribed and reported as such.

What it means for you

Larger sizes and higher clarity for a given budget, with an origin stated plainly on the report. Resale behaves differently from natural goods, and that is worth understanding before you buy.

767 stones of 2,114

Download spec sheet (PDF)

Current availability is confirmed on enquiry.

Round 1.41 ct

Lab-grown
Colour
F
Clarity
VVS2
Cut
Ideal
Polish
Excellent
Symmetry
Excellent
Report
IGI

TP-160625-1460

Round 1.31 ct

Lab-grown
Colour
D
Clarity
VVS2
Cut
Ideal
Polish
Excellent
Symmetry
Excellent
Report
IGI

TP-191225-2918

Round 1.23 ct

Lab-grown
Colour
E
Clarity
VVS2
Cut
Ideal
Polish
Excellent
Symmetry
Excellent
Report
IGI

TP-130326-3154

Round 1.22 ct

Lab-grown
Colour
E
Clarity
VVS2
Cut
Ideal
Polish
Excellent
Symmetry
Excellent
Report
IGI

TP-191225-2919

Round 1.20 ct

Lab-grown
Colour
D
Clarity
VVS2
Cut
Ideal
Polish
Excellent
Symmetry
Excellent
Report
IGI

TP-310126-3066

Round 1.01 ct

Lab-grown
Colour
E
Clarity
VVS2
Cut
Ideal
Polish
Excellent
Symmetry
Excellent
Report
IGI

TP-150826-3371

Round 0.91 ct

Lab-grown
Colour
D
Clarity
VVS2
Cut
Ideal
Polish
Excellent
Symmetry
Excellent
Report
IGI

TP-160625-1473

Round 0.90 ct

Lab-grown
Colour
D
Clarity
VVS2
Cut
Ideal
Polish
Excellent
Symmetry
Excellent
Report
IGI

TP-010425-1156

Colour
D
Clarity
VVS2
Polish
Very Good
Symmetry
Excellent
Report
IGI

TP-030725-1717

Colour
D
Clarity
VVS2
Polish
Very Good
Symmetry
Very Good
Report
IGI

TP-020825-2076

Colour
E
Clarity
VVS2
Polish
Excellent
Symmetry
Excellent
Report
IGI

TP-191225-2915

Colour
F
Clarity
VVS2
Polish
Excellent
Symmetry
Excellent
Report
IGI

TP-260526-3275

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