Show UniqueIdentification

Id	71
Identification Type	Mineral
Name	Tourmaline
Distinguishing Features	Prismatic Pleochroic Heavy-mineral
Description	Transparent, variety of colors or colorless. Pleochroic (variable with composition). Moderate birefringence giving vivid colors. Elongate prismatic crystals to rounded grains. Moderate to high relief. Straight extinction. Often has inclusions.
Tags	silicate moderate-birefringence elongate high-relief
External Resources	Tourmaline on MinDat
Imposters
Images

	Unique Identification: Tourmaline Site name: Tanners Light type: Plane-Polarized Light Magnification: 400x Submitted by: Amy Myrbo Notes: prismatic blunt-ended faceted Image Tags: none
	Unique Identification: Tourmaline Site name: Tanners Light type: Cross-Polarized Light Magnification: 400x Submitted by: Amy Myrbo Notes: prismatic blunt-ended faceted Image Tags: none
	Unique Identification: Tourmaline Site name: Arthurs Lake Light type: Plane-Polarized Light Magnification: 630 Submitted by: Val Stanley Notes: none Image Tags: black euhedral
	Unique Identification: Tourmaline Site name: Arthurs Lake Light type: Plane-Polarized Light Magnification: not specified Submitted by: not specified Notes: none Image Tags: pleochroic
	Unique Identification: Tourmaline Site name: Arthurs Lake Light type: Plane-Polarized Light Magnification: not specified Submitted by: not specified Notes: none Image Tags: pleochroic
	Unique Identification: Tourmaline Site name: Arthurs Lake Light type: Plane-Polarized Light Magnification: not specified Submitted by: not specified Notes: none Image Tags: pleochroic
	Unique Identification: Tourmaline Site name: Arthurs Lake Light type: Cross-Polarized Light Magnification: not specified Submitted by: not specified Notes: none Image Tags: none

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