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Glass Gems

Glass gems are dome-shaped lumps of glass with flat bottoms that can be used as tesserae (tile) in craft projects and mixed-media mosaic. These glass gem are American made by Marble King and have more intense colors and better clarity than most Asian gems. The glass gems are sold by the half pound. The count of 60+ gems is a NOMINAL count only, which means the bags can contain less than 60 pieces when they are running large. The gems are APPROXIMATELY 5/8" in diameter. They are NOT perfectly circular. Note that "TUMBLED" gems have a FROSTED surface.

Read more about using glass gems in mosaics at the bottom of this page.

Displaying products 1 - 30 of 41 results
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assorted cats eye translucent glass gems
ASSORTED TRANSLUCENT Gems 1/2 lb
Price: $3.26
ASSORTED TRANSLUCENT Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
assorted tumbled glass gems
ASSORTED TUMBLED Gems 1/2 lb
Price: $3.26
ASSORTED TUMBLED Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
amber cats eye glass gems
AMBER Cats Eye Gems 1/2 lb
Price: $2.26
AMBER Cats Eye Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
yellow cats eye glass gems
YELLOW Cats Eye Gems 1/2 lb
Price: $2.26
YELLOW Cats Eye Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
green cats eye glass gems
GREEN Cats Eye Gems 1/2 lb
Price: $2.26
GREEN Cats Eye Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
amethyst cats eye glass gems
AMETHYST Cats Eye Gems 1/2 lb
Price: $2.26
AMETHYST Cats Eye Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
blue cats eye glass gems
BLUE Cats Eye Gems 1/2 lb
Price: $2.26
BLUE Cats Eye Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
peach cats eye glass gems
PEACH Cats Eye Gems 1/2 lb
Price: $2.26
PEACH Cats Eye Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
white solid glass gems
WHITE SOLID Gems 1/2 lb
Price: $2.50
WHITE SOLID Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
seafoam solid glass gems
SEAFOAM SOLID Gems 1/2 lb
Price: $2.50
SEAFOAM SOLID Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
black solid glass gems
BLACK SOLID Gems 1/2 lb
Price: $2.26
BLACK SOLID Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
ivory solid glass gems
IVORY SOLID Gems 1/2 lb
Price: $2.50
IVORY SOLID Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
opal pink glass gems
OPAL PINK Gems 1/2 lb
Price: $4.10
OPAL PINK Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
amber translucent glass gems
AMBER TRANSLUCENT Gems 1/2 lb
Price: $2.26
AMBER TRANSLUCENT Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
azure translucent glass gems
AZURE TRANSLUCENT Gems 1/2 lb
Price: $2.26
AZURE TRANSLUCENT Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
ruby crimson translucent glass gems
RUBY TRANSLUCENT Gems 1/2 lb
Price: $3.32
RUBY TRANSLUCENT Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
lime translucent glass gems
LIME TRANSLUCENT Gems 1/2 lb
Price: $2.26
LIME TRANSLUCENT Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
clear translucent glass gems
CLEAR TRANSLUCENT Gems 1/2 lb
Price: $2.26
CLEAR TRANSLUCENT Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
cobalt translucent glass gems
COBALT TRANSLUCENT Gems 1/2 lb
Price: $2.26
COBALT TRANSLUCENT Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
amethyst translucent glass gems
AMETHYST TRANSLUCENT Gems 1/2 lb
Price: $2.26
AMETHYST TRANSLUCENT Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
tumbled lemon cats eye glass gems
Tumbled LEMON Cats Eye Gems 1/2 lb
Price: $2.73
Tumbled LEMON Cats Eye Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
tumbled lime cats eye glass gems
Tumbled LIME SPECIAL Cats Eye Gems 1/2 lb
Price: $2.73
Tumbled LIME SPECIAL Cats Eye Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
tumbled amber cats eye glass gems
Tumbled AMBER Cats Eye Gems 1/2 lb
Price: $2.73
Tumbled AMBER Cats Eye Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
tumbled yellow cats eye glass gems
Tumbled YELLOW Cats Eye Gems 1/2 lb
Price: $2.73
Tumbled YELLOW Cats Eye Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
tumbled green cats eye glass gems
Tumbled GREEN Cats Eye Gems 1/2 lb
Price: $2.73
Tumbled GREEN Cats Eye Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
tumbled amethyst cats eye glass gems
Tumbled AMETHYST Cats Eye Gems 1/2 lb
Price: $2.73
Tumbled AMETHYST Cats Eye Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
tumbled blue cats eye glass gems
Tumbled BLUE Cats Eye Gems 1/2 lb
Price: $2.73
Tumbled BLUE Cats Eye Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
tumbled peach cats eye glass gems
Tumbled PEACH Cats Eye Gems 1/2 lb
Price: $2.73
Tumbled PEACH Cats Eye Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
tumbled amber translucent glass gems
Tumbled AMBER TRANSLUCENT Gems 1/2 lb
Price: $2.72
Tumbled AMBER TRANSLUCENT Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
tumbled azure translucent glass gems
Tumbled AZURE TRANSLUCENT Gems 1/2 lb
Price: $2.72
Tumbled AZURE TRANSLUCENT Gems 1/2 lb
1/2 pound (60+) glass gem marbles 5/8 inch nominal diameter for use in mosaic art
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Glass Gems Used As Mosaic Tile

American-Made Material

You can find cheaper glass gems on the market, but those are made in China. Our gems are made in America in accordance with more sustainable labor and environmental standards, and that is what you are paying for. Buying American-made products has nothing to do with nationalism and everything to do with being a responsible  global citizen.

Product Variation

These gems are circular domes of glass, but they vary in size and exact shape. Please do NOT purchase these if you need tightly controlled shapes or sizes. Also, the glass is not optical quality and contains occasional bubbles. We sell these for use as mosaic tile, not covers for photo refrigerator magnets, etc.

Product Coverage

A 1/2-pound bag of glass gems coveres approximately 25 square inches, possibly as much as 36 square inches or 1/4 square foot. Glass gems are better used as accents  than area coverage because they are circular and can nest together only so tightly. There will always be a larger than desired gap at the juncture between multiple gems.

Compatibility

Glass gems are thicker than most types of glass mosaic tile, which is usually ~1/8 inch thick. The glass gems are about ~3/16 inch thick, but that is approximate and not tightly controlled. All that being said, the reason to use something like glass gems is precisely BECAUSE you want something that sticks out slightly above the surface of the ordinary tile. This gives the otherwise flat surface of the mosaic an element of dimensionality, something that can be felt with the hand.

Cutting

Cutting glass gems leaves a sharp edge on an otherwise rounded shape, and for this reason it isn't commonly done. The sharp edge can be smoothed using  the fine side of a  marble file,  but that only removes the safety issue. Visually, the cut edge will still be sharp compared to the other part of the gem.  If you do need to cut the gem, use a mosaic glass cutter.

Product Specifications

     
  • American-made glass gems.
  •    
  • APPROXIMATELY 5/8" inch diameter.
  •  
  • dome-shaped circular lumps with flat bottoms.
  •  
  • varies in size and circularity.
  •    
  • 1/2 pound.
  •    
  • approximately 60+ pieces. Piece count is lower when gems are running larger, and this varies by manufacturer batch.
  •  
 

Use In Mosaic Art

The tops of the glass gems are dome shaped instead of flat surfaces, and this has significant implications for the grouting process. When grouting a mosaic made from glass gems, many novices fail to remove enough grout, leaving most of the glass gem covered.  The result is that the finished mosaic appears to be  mostly grout with just a little bit of glass peeking out. You have to use your fingertips to remove the grout covering the edges of the gems and make sure that you  expose more than just the very tops of the domes.

More Information

For more information on how to design mosaics and use glass gems to create artwork, see our page of  Frequently Asked Questions
or our List of How-To-Mosaic Pages,  which are topic specific.

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