The Mica Group

Large crystals of mica used for various applications are typically mined from granitic pegmatites. Collectible Mica specimens in the USA can be found in Spruce Pine, Franklin-Sylva and Shelby Hickory districts of North Carolina.

The mica group of sheet silicate (phyllosilicate) minerals includes several closely related materials having nearly perfect basal cleavage. Mica is normally found to be monoclinic (pseudo hexagonal), there also are hexagonal, orthorhombic, and triclinic forms generally referred to as polytopes. Among the principal rock-forming minerals, micas are found in all three major rock varieties; igneous, sedimentary, and metamorphic.

Of the 28 known species of the mica group, only 6 are common rock-forming minerals.

1) Muscovite, (Potassium Mica) the common light-colored mica. It was originally called “Muscovy glass” because it came from the Muscovy province of Russia

2) Biotite, (Magnesium Iron Mica) which is typically black or nearly so, is the most abundant. Biotite was named for Jean-Baptiste Biot, a 19th-century French physicist who studied the optical properties of micas.

3) Phlogopite, (Magnesium Mica) typically brown. Its name comes from the Greek word ‘phlogopos’ for fire like, which was chosen because of the reddish glow (color and luster) of some specimens

4) Paragonite, (Sodium Mica) which is macroscopically indistinguishable from muscovite, also is fairly common. From the Greek word ‘paragon’ “to mislead,” was so named because it was originally mistaken as talc.

5) Lepidolite, (Lithium Mica) generally pinkish to lilac in color, occurs in lithium-bearing pegmatites. From the Greek word 'lepidos' meaning “scale,” was based on the appearance of the mineral’s cleavage plates

6) Glauconite, (Iron Potassium Phyllosilicate Mica) a green species that does not have the same general macroscopic characteristics as the other micas, occurs sporadically in many marine sedimentary sequences. All of these micas except Glauconite exhibit easily observable perfect cleavage into flexible sheets. Glauconite, which most often occurs as pellet like grains, has no apparent cleavage. Although typically green, was named for the Greek word for blue ‘glaucos ‘

A rare crystallized Mica that can be found near Shelby, Cleveland County, North Carolina is a tabular 6 sided Phlogopite Mica. It has sharp, well defined mica crystals and most specimens have a red-brown clay in the crevices between the crystals. The mica crystals are brown, platy hexagonal form, with secondary edge faces. When back lit or viewed in the correct sunlight angle the crystals show translucent solidification of the mica plates. The individual sheets or layers of mica actually crystallize and form single solid crystals. These amazing solid crystals are found in clusters. These rare North Carolina crystallized Mica specimens are highly sought after!

505g Mica Crystals from Mitchell County, North Carolina
505g Mica Crystals from Mitchell County, North Carolina
505g Mica Crystals from Mitchell County, North Carolina
505g Mica Crystals from Mitchell County, North Carolina
505g Mica Crystals from Mitchell County, North Carolina
505g Mica Crystals from Mitchell County, North Carolina
505g Mica Crystals from Mitchell County, North Carolina 505g Mica Crystals from Mitchell County, North Carolina 505g Mica Crystals from Mitchell County, North Carolina 505g Mica Crystals from Mitchell County, North Carolina 505g Mica Crystals from Mitchell County, North Carolina 505g Mica Crystals from Mitchell County, North Carolina
Item # 24MIC03170003

505g Mica Crystals from Mitchell County, North Carolina

$99.00

Sold Out!

This specimen has multiple tabular 6 sided Phlogopite Mica crystals. Large mica crystal clusters are quite rare. The mica crystals are brown, platy hexagonal form, with secondary edge faces. When back lit or viewed in the correct sunlight angle the crystals show translucent solidification of the mica plates.

Specimen weighs 17.8oz or 1.1 lb (505g) and measures 4.9 x 4.4 x 2.1" (12.4 x 11.1 x 5.5cm)

Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C. Crystallized Mica from Shelby, Cleveland County, N.C. Crystallized Mica from Shelby, Cleveland County, N.C.
Item # 18MIC06161512

Crystallized Mica from Shelby, Cleveland County, N.C.

 $49.00

This is a rare and special mica specimen from near Shelby in Cleveland County, North Carolina. These unique crystals have a translucent amber color when viewed in correct sunlight angle or when back lit.

Specimen weighs 1.48oz (42g) and measures 1.79 x 1.44 x 1.1" (45 x 37 x 28mm)

 

Crystallized Mica from Shelby, Cleveland County, N.C
Crystallized Mica from Shelby, Cleveland County, N.C
Crystallized Mica from Shelby, Cleveland County, N.C
Crystallized Mica from Shelby, Cleveland County, N.C Crystallized Mica from Shelby, Cleveland County, N.C Crystallized Mica from Shelby, Cleveland County, N.C
Item # 19MIC06161591

Crystallized Mica from Shelby, Cleveland County, N.C.

$42.00

Sold Out!

This is a rare and special mica specimen from near Shelby in Cleveland County, North Carolina. These unique crystals have a translucent amber color when viewed in correct sunlight angle or when back lit.

Specimen weighs 1.46oz (41g) and measures 1.82 x 1.39 x 1.22" (46 x 35 x 31mm)

Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C. Crystallized Mica from Shelby, Cleveland County, N.C. Crystallized Mica from Shelby, Cleveland County, N.C.
Item # 20MIC06161531

Crystallized Mica from Shelby, Cleveland County, N.C.

$27.00

Sold Out!

This is a rare and special mica specimen from near Shelby in Cleveland County, North Carolina. These unique crystals have a translucent amber color when viewed in correct sunlight angle or when back lit.

Specimen weighs 0.74oz (21g) and measures 1.48 x 1.1 x 0.98" (37 x 28 x 25mm)

Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C. Crystallized Mica from Shelby, Cleveland County, N.C. Crystallized Mica from Shelby, Cleveland County, N.C.
Item # 21MIC06161521

Crystallized Mica from Shelby, Cleveland County, N.C.

$25.00

Sold Out!

This is a rare and special mica specimen from near Shelby in Cleveland County, North Carolina. These unique crystals have a translucent amber color when viewed in correct sunlight angle or when back lit.

Specimen weighs 0.72oz (20g) and measures 1.41 x 1.14 x 0.81" (36 x 29 x 20mm)

Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C. Crystallized Mica from Shelby, Cleveland County, N.C. Crystallized Mica from Shelby, Cleveland County, N.C.
Item # 22MIC061615111

Crystallized Mica from Shelby, Cleveland County, N.C.

$24.00

This is a rare and special mica specimen from near Shelby in Cleveland County, North Carolina. These unique crystals have a translucent amber color when viewed in correct sunlight angle or when back lit.

Specimen weighs 0.6oz (17.5g) and measures 1.17 x 1 x 0.91" (30 x 26 x 23mm)

Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C. Crystallized Mica from Shelby, Cleveland County, N.C. Crystallized Mica from Shelby, Cleveland County, N.C.
Item # 23MIC06161501

Crystallized Mica from Shelby, Cleveland County, N.C.

$23.00

Sold Out!

This is a rare and special mica specimen from near Shelby in Cleveland County, North Carolina. These unique crystals have a translucent amber color when viewed in correct sunlight angle or when back lit.

Specimen weighs 0.3oz (9g) and measures 1.12 x 1.11 x 0.66" (28 x 28 x 17mm)

Crystallized Mica Thumbnail from Shelby, Cleveland County, N.C.
Crystallized Mica Thumbnail from Shelby, Cleveland County, N.C.
Crystallized Mica Thumbnail from Shelby, Cleveland County, N.C.
Crystallized Mica Thumbnail from Shelby, Cleveland County, N.C.
Crystallized Mica Thumbnail from Shelby, Cleveland County, N.C.
Crystallized Mica Thumbnail from Shelby, Cleveland County, N.C.
Crystallized Mica Thumbnail from Shelby, Cleveland County, N.C. Crystallized Mica Thumbnail from Shelby, Cleveland County, N.C. Crystallized Mica Thumbnail from Shelby, Cleveland County, N.C. Crystallized Mica Thumbnail from Shelby, Cleveland County, N.C. Crystallized Mica Thumbnail from Shelby, Cleveland County, N.C. Crystallized Mica Thumbnail from Shelby, Cleveland County, N.C.
Item # TNMIC06161511

Crystallized Mica Thumbnail from Shelby, Cleveland County, N.C.

$25.00

Sold Out!

This is a rare and special mica specimen from near Shelby in Cleveland County, North Carolina. These unique crystals have a translucent amber color when viewed in correct sunlight angle or when back lit. Placed in TN box with Mineral Tack

Specimen weighs 0.26oz (7.5g) and measures 1 x 0.75 x 0.62" (25 x 19 x 16mm)

Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C. Crystallized Mica from Shelby, Cleveland County, N.C. Crystallized Mica from Shelby, Cleveland County, N.C.
Item # 25MIC06161521

Crystallized Mica from Shelby, Cleveland County, N.C.

$25.00

This is a rare and special mica specimen from near Shelby in Cleveland County, North Carolina. These unique crystals have a translucent amber color when viewed in correct sunlight angle or when back lit.

Specimen weighs 0.6oz (17.5g) and measures 1.3 x 0.9 x 0.7" (34 x 23 x 19mm)

Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C. Crystallized Mica from Shelby, Cleveland County, N.C. Crystallized Mica from Shelby, Cleveland County, N.C.
Item # 26MIC06161521

Crystallized Mica from Shelby, Cleveland County, N.C.

$25.00

Sold Out!

This is a rare and special mica specimen from near Shelby in Cleveland County, North Carolina. These unique crystals have a translucent amber color when viewed in correct sunlight angle or when back lit.

Specimen weighs 0.6oz (17.5g) and measures 1.6 x 0.9 x 0.6" (41 x 23 x 15mm)

Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C.
Crystallized Mica from Shelby, Cleveland County, N.C. Crystallized Mica from Shelby, Cleveland County, N.C. Crystallized Mica from Shelby, Cleveland County, N.C.
Item # 27MIC06161521

Crystallized Mica from Shelby, Cleveland County, N.C.

$25.00

Sold Out!

This is a rare and special mica specimen from near Shelby in Cleveland County, North Carolina. These unique crystals have a translucent amber color when viewed in correct sunlight angle or when back lit.

Specimen weighs 0.78oz (22g) and measures 1.4 x 1.3 x 0.9" (35 x 32 x 22mm)