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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.

23 stones of 2,114

Download spec sheet (PDF)

Current availability is confirmed on enquiry.

Round 1.50 ct

Lab-grown
Colour
E
Clarity
VS1
Cut
Very Good
Polish
Excellent
Symmetry
Excellent
Report
IGI

TP-290526-3280

Round 1.00 ct

Lab-grown
Colour
D
Clarity
VS1
Cut
Very Good
Polish
Excellent
Symmetry
Excellent
Report
IGI

TP-180526-3260

Round 0.52 ct

Lab-grown
Colour
D
Clarity
VS1
Cut
Very Good
Polish
Very Good
Symmetry
Very Good
Report
IGI

TP-220725-1991

Colour
Fancy Vivid Blue
Clarity
VVS2
Cut
Very Good
Polish
Excellent
Symmetry
Very Good
Report
IGI

TP-030425-1206

Colour
Fancy Vivid Green
Clarity
VS2
Cut
Very Good
Polish
Very Good
Symmetry
Very Good
Report
IGI

TP-220725-1996

Colour
Fancy Vivid Pink
Clarity
VS2
Cut
Very Good
Polish
Excellent
Symmetry
Excellent
Report
IGI

TP-301124-841

Colour
Fancy Vivid Pink
Clarity
VS1
Cut
Very Good
Polish
Very Good
Symmetry
Very Good
Report
IGI

TP-150226-3107

Colour
Fancy Vivid Pink
Clarity
VS1
Cut
Very Good
Polish
Excellent
Symmetry
Very Good
Report
IGI

TP-05-24-283

Colour
Fancy Vivid Pink
Clarity
VS1
Cut
Very Good
Polish
Excellent
Symmetry
Very Good
Report
IGI

TP-060126-3001

Colour
Fancy Vivid Pink
Clarity
VVS2
Cut
Very Good
Polish
Excellent
Symmetry
Good
Report
IGI

TP-081125-2563

Colour
Fancy Vivid Pink
Clarity
VS1
Cut
Very Good
Polish
Very Good
Symmetry
Very Good
Report
IGI

TP-060126-3002

Colour
Fancy Vivid Pink
Clarity
VS1
Cut
Very Good
Polish
Very Good
Symmetry
Very Good
Report
IGI

TP-060126-3004

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