Fibrolite (Sillimanite) Gemstones

  • Hardness

    6.0 - 7.5 on the Mohs scale.

  • Occurrence

    Myanmar (Burma), Sri Lanka (Ceylon), U.S. (Idaho), Czechoslovakia, India, Italy, Germany, Brazil

  • Appearance

    Sometimes referred to as "fibrolite", the crystals occur in groups, resembling fibers.

  • Enhancements

    Sillimanite is not known to be enhanced.

    More information on gemstone enhancements.

Fibrolite
Fibrolite

SLM120
SLM120
 5.52 ct.
12.2mm Cabochon, Round Cut
Extremely Dark
Slightly Brownish Strongly Purplish Red
Translucent
[N] Not enhanced.
One of a kind.
With an excellent cat's eye.
Fibrolite

SLM121
SLM121
 9.12 ct.
10.9x11.2mm Cabochon, Round Cut
Extremely Dark
Slightly Brownish Strongly Purplish Red
Translucent
[N] Not enhanced.
One of a kind.
With an excellent cat's eye.
Fibrolite

SLM122
SLM122
 11.72 ct.
12.2x12.3mm Cabochon, Round Cut
Extremely Dark
Slightly Brownish Strongly Purplish Red
Translucent
[N] Not enhanced.
One of a kind.
With an excellent cat's eye.
Fibrolite

SLM128
SLM128
 4.77 ct.
11.0x10.6mm Cabochon, Round Cut
Very Dark
Brown
Opaque
[N] Not enhanced.
One of a kind.
With an excellent cat's eye.
Fibrolite

SLM129
SLM129
 5.46 ct.
10.0mm Cabochon, Round Cut
Very Dark
Brown
Opaque
[N] Not enhanced.
One of a kind.
With an excellent cat's eye.
Fibrolite

SLM130
SLM130
 6.69 ct.
11.1x10.8mm Cabochon, Round Cut
Very Dark
Brown
Opaque
[N] Not enhanced.
One of a kind.
With an excellent cat's eye.
Fibrolite

SLM123
SLM123
 3.65 ct.
10.9x9.1mm Cabochon, Oval Cut
Extremely Dark
Slightly Brownish Strongly Purplish Red
Translucent
[N] Not enhanced.
One of a kind.
With an excellent cat's eye.
Fibrolite

SLM124
SLM124
 5.98 ct.
11.7x9.2mm Cabochon, Oval Cut
Extremely Dark
Slightly Brownish Strongly Purplish Red
Translucent
[N] Not enhanced.
One of a kind.
With an excellent cat's eye.
Fibrolite

SLM125
SLM125
 10.26 ct.
13.1x11.3mm Cabochon, Oval Cut
Extremely Dark
Slightly Brownish Strongly Purplish Red
Translucent
[N] Not enhanced.
One of a kind.
With an excellent cat's eye.
Fibrolite

SLM126
SLM126
 10.05 ct.
15.0x10.1mm Cabochon, Oval Cut
Extremely Dark
Slightly Brownish Strongly Purplish Red
Translucent
[N] Not enhanced.
One of a kind.
With an excellent cat's eye.
Fibrolite

SLM127
SLM127
 18.04 ct.
15.3x12.4mm Cabochon, Oval Cut
Extremely Dark
Slightly Brownish Strongly Purplish Red
Translucent
[N] Not enhanced.
One of a kind.
With an excellent cat's eye.
Fibrolite

SLM131
SLM131
 3.14 ct.
7.7x7.2mm Cabochon, Oval Cut
Very Dark
Brown
Opaque
[N] Not enhanced.
One of a kind.
With an excellent cat's eye.
Fibrolite

SLM133
SLM133
 4.76 ct.
11.8x9.2mm Cabochon, Oval Cut
Very Dark
Brown
Opaque
[N] Not enhanced.
One of a kind.
With an excellent cat's eye.
Fibrolite

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