Micas
Micas are early German handmade marbles (many with a faceted pontil, indicating manufacture before 1880) and are made of transparent glass with subsurface silvery mica flakes that take on the color of the matrix glass they’re submerged into. Most common matrix glass colors are clear, various shades of amber or brown, various shades of blue from light blue to deep cobalt blue, and various shades of green from teal to dark army green.
Micas may sometimes be found to contain more than one layer of mica, and this is exceptionally unusual and appealing but it does not drastically increase the value of the Mica. It’s easy to miss these – have to look.
Single pontil Mica Clouds are uncommonly found, and they are a premium of about 4x the price of similar 2-pontil mica.
Unusual micas are “cased micas,” meaning the mica flakes have been placed on top of the colored glass matrix so that it doesn’t take on the color of the matrix glass, and it’s encased in clear glass. These have vivid contrast of the mica against the base matrix color and are in high demand among collectors. Most commonly found cased micas are blue.
On occasion, other colors will be added to a clear mica such as streaks of transparent red, green or blue to add to the appeal of the marble. These types of micas are rare and valuable.
Rare mica colors (listed in progressive rarity) are yellow, red, or black are extremely highly sought after marbles. Black micas are usually cased in clear glass with the silvery mica flakes contrasting vividly against the black and maglights smokey grey usually, but not always.
Uranium yellow glass micas are ultra-rare. They glow brightly under a black light.
Most common sizes are 9/16-7/8”. Peewees of ½” or less are fairly common. Any Mica over 1” would also generate a premium. Micas of 1-1/4” or larger are rarely found and have increasing demand based on size.
Showing 13–24 of 37 results
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25/32″ Deep Cobalt Blue Mica
$55.00 Size: 25/32"
Condition: WET MINT-
Grade: 9.7 -
Beautiful & Bright Golden Amber Mica
$20.00 Size: 9/16"
Condition: Mint
Grade: 9.7 -
Purple Mica in Fantastic Condition!
$45.00 Size: 9/16"
Condition: Mint
Grade: 9.7 -
23/32″ Bright Apple Green Mica w/ Large Flakes
$30.00 Size: 23/32"
Condition: Wet Mint
Grade: 9.8 -
1/2″+ Dark Forest Green Mica
$30.00 Size: 1/2"+
Condition: Mint
Grade: 9.6 -
Pink Onionskin w/ Plentiful Mica and Blue & Green Stripes
$165.00 Size: 21/32"
Condition: Wet Mint
Grade: 9.9 -
13/16″ Large Green Mica w/ Large Flakes
$25.00 Size: 13/16"
Condition: Mint Minus
Grade: 9.2 -
Immaculate 1″ Large Deep Amber Mica
$200.00 Size: 1"
Condition: Wet Mint
Grade: 9.9 -
25/32″ Sky Blue Mica w/ Many Small Mica Flakes
$55.00 Size: 25/32"
Condition: Mint
Grade: 9.7 -
Large 7/8″ Clear Mica w/ Blizzard of Fine Mica Flakes
$40.00 Size: 7/8"
Condition: Mint Minus
Grade: 9.3 -
SOLD OUT
Super Rare Big 1-7/32″ Single Pontil Multicolor Mist Blizzard Mica – Wet Mint
$1,250.00 Size: 1-7/32"
Condition: Wet Mint
Grade: 9.8 -
SOLD OUT
Clear Mica w/ Large Mica Flakes & a Ghost Core
$20.00 Size: 11/16"+
Condition: Mint
Grade: 9.7