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Gemstones, Agates, Amethyst

Our polished gemstones and agates are natural undyed material and sold in 1/4 pound lots. There are approximately 40 to 60 pieces per 1/4 pound. Piece sizes range from approximately 1/2 to 3/4 inch. Gemstones have natural variation in their exact color, pattern and shape. Use our Quick Order Checklist to order rapidly using a list. We also have a page of unpolished rough minerals.

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

Displaying products 1 - 30 of 39 results
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Sodalite tumbled gemstone 1/4 pound
Sodalite tumbled gemstone 1/4 pound
Price: $5.28
Sodalite tumbled gemstone 1/4 pound
Sodalite tumbled gemstone 1/4 pound
Carnelian tumbled gemstone 1/4 pound
Carnelian tumbled gemstone 1/4 pound
Price: $5.28
Carnelian tumbled gemstone 1/4 pound
Carnelian tumbled gemstone 1/4 pound
Amethyst tumbled gemstone DARK 1/4 lb
Amethyst tumbled gemstone DARK 1/4 lb
Price: $9.07
Amethyst tumbled gemstone DARK 1/4 lb
Amethyst tumbled gemstone SMALL 1/4 lb
Apricote Agate tumbled gemstone 1/4 lb
Apricote Agate tumbled gemstone 1/4 lb
Price: $5.28
Apricote Agate tumbled gemstone 1/4 lb
Apricot Agate tumbled gemstone 1/4 lb
Green Moss Agate tumbled gemstone 1/4 lb
Green Moss Agate tumbled gemstone 1/4 lb
Price: $4.51
Green Moss Agate tumbled gemstone 1/4 lb
Green Moss Agate tumbled gemstone 1/4 lb
Tree Agate tumbled gemstone 1/4 lb
Tree Agate tumbled gemstone 1/4 lb
Price: $4.51
Tree Agate tumbled gemstone 1/4 lb
Tree Agate tumbled gemstone 1/4 lb
Turritella Agate tumbled gemstone 1/4 lb
Turritella Agate tumbled gemstone 1/4 lb
Price: $4.85
Turritella Agate tumbled gemstone 1/4 lb
Turritella Agate tumbled gemstone 1/4 lb
Amazonite Agate tumbled gemstone 1/4 lb
Amazonite Agate tumbled gemstone 1/4 lb
Price: $7.56
Amazonite Agate tumbled gemstone 1/4 lb
Amazonite Agate tumbled gemstone 1/4 lb
Chrysocolla Agate tumbled gemstone 1/4 lb
Chrysocolla Agate tumbled gemstone 1/4 lb
Price: $5.28
Chrysocolla Agate tumbled gemstone 1/4 lb
Chrysocolla Agate tumbled gemstone 1/4 lb
Dalmation Stone tumbled gemstone 1/4 lb
Dalmation Stone tumbled gemstone 1/4 lb
Price: $4.51
Dalmation Stone tumbled gemstone 1/4 lb
Dalmation Stone tumbled gemstone 1/4 lb
Jasper tumbled gemstone 1/4 lb
Jasper tumbled gemstone 1/4 lb
Price: $4.10
Jasper tumbled gemstone 1/4 lb
Jasper tumbled gemstone 1/4 lb
Zebra Marble tumbled gemstone 1/4 lb
Zebra Marble tumbled gemstone 1/4 lb
Price: $4.51
Zebra Marble tumbled gemstone 1/4 lb
Zebra Marble tumbled gemstone 1/4 lb
Peach Quartz tumbled gemstone 1/4 lb
Peach Quartz tumbled gemstone 1/4 lb
Price: $5.28
Peach Quartz tumbled gemstone 1/4 lb
Peach Quartz tumbled gemstone 1/4 lb
Unakite tumbled gemstone 1/4 lb
Unakite tumbled gemstone 1/4 lb
Price: $4.51
Unakite tumbled gemstone 1/4 lb
Unakite tumbled gemstone 1/4 lb
Obsidian tumbled gemstone 1/4 pound
Obsidian tumbled gemstone 1/4 pound
Price: $4.52
Obsidian tumbled gemstone 1/4 pound
Obsidian tumbled gemstone 1/4 pound
Buddstone tumbled gemstone 1/4 pound
Buddstone tumbled gemstone 1/4 pound
Price: $4.52
Buddstone tumbled gemstone 1/4 pound
Buddstone tumbled gemstone 1/4 pound
Banded Carnelian tumbled gemstone 1/4 pound
Banded Carnelian tumbled gemstone 1/4 pound
Price: $4.25
Banded Carnelian tumbled gemstone 1/4 pound
Banded Carnelian tumbled gemstone 1/4 pound
Bloodstone tumbled gemstone 1/4 pound
Bloodstone tumbled gemstone 1/4 pound
Price: $4.57
Bloodstone tumbled gemstone 1/4 pound
Bloodstone tumbled gemstone 1/4 pound
Blue Chalcedony tumbled gemstone 1/4 pound
Blue Chalcedony tumbled gemstone 1/4 pound
Price: $5.70
Blue Chalcedony tumbled gemstone 1/4 pound
Carnelian tumbled gemstone 1/4 pound
Moonstone tumbled gemstones 1/4 pound
Moonstone tumbled gemstones 1/4 pound
Price: $5.70
Moonstone tumbled gemstones 1/4 pound
Moonstone tumbled gemstones 1/4 pound
Green Quartz tumbled gemstone 1/4 pound
Green Quartz tumbled gemstone 1/4 pound
Price: $3.99
Green Quartz tumbled gemstone 1/4 pound
Green Quartz tumbled gemstone 1/4 pound
Rainforest Rhyolite tumbled gemstone 1/4 pound
Rainforest Rhyolite tumbled gemstone 1/4 pound
Price: $4.58
Rainforest Rhyolite tumbled gemstone 1/4 pound
Rainforest Rhyolite Quartz tumble gemstone 1/4 pound
Madagascar Rhodonite tumbled gemstone 1/4 pound
Rhodonite (Madagascar) tumbled gemstone 1/4 pound
Price: $5.70
Rhodonite (Madagascar) tumbled gemstone 1/4 pound
Madagascar Rhodonite tumble gemstone 1/4 pound
Sunstone tumbled gemstone 1/4 pound
Sunstone tumbled gemstone 1/4 pound
Price: $4.10
Sunstone tumbled gemstone 1/4 pound
Sunstone tumbled gemstone 1/4 pound
Opal Olive tumbled gemstone 1/4 lb
Opal Olive gemstone 1/4 lb
Price: $5.70
Opal Olive gemstone 1/4 lb
Opal Olive tumbled gemstone 1/4 lb
Red Aventurine tumbled gemstone 1/4 pound
Red Aventurine tumbled gemstone 1/4 pound
Price: $3.63
Red Aventurine tumbled gemstone 1/4 pound
Red Aventurine tumbled gemstone 1/4 pound
agnesite nuggets gemstones 1/4 pound
Magnesite Nuggets 1/4 pound
Price: $3.43
Magnesite Nuggets 1/4 pound
Magnesite tumbled gemstones 1/4 pound
Rock Crystal tumbled gemstone 1/4 lb
Rock Crystal tumbled gemstone 1/4 lb
Price: $3.99
Rock Crystal tumbled gemstone 1/4 lb
Rock Crystal tumbled gemstone 1/4 lb
Brecceated Jasper tumbled gemstone 1/4 lb
Brecceated Jasper tumbled gemstone 1/4 lb
Price: $5.28
Brecceated Jasper tumbled gemstone 1/4 lb
Brecceated Jasper tumbled gemstone 1/4 lb
Banded Amethyst tumbled gemstone 1/4 lb
Banded Amethyst tumbled gemstone 1/4 lb
Price: $6.81
Banded Amethyst tumbled gemstone 1/4 lb
Banded Amethyst tumbled gemstone 1/4 lb
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Gemstones Used As Mosaic Tile

Natural Material

We do not sell dyed gemstones. All of our stones are natural material that has been rounded and smoothed by tumbling in silicon carbide grit and then polished with metal oxide.

Product Variation

The gemstones we sell have been running fairly consistent over the years, but there is always the potential for pattern, color and roundness to vary slightly from the product photographs.

Product Coverage

There is no straightforward answer to coverage for materials that are irregular in shape such as the gemstones. Certain pieces will be thin, and these do not always look right when you position them flat next to a piece that is much fatter or rounded. For this reason, the thin pieces are usually nested on end, or at least semi-overlapped, which is best accomplished by pressing them into thinset mortar (but can be done with glue as well). Nesting or overlapping the gemstones on end means that they cover less area than they would if laid flat, and that is why they are mostly used for accents in mixed-media mosaics instead of covering areas.

Area coverage would probably be about 2 to 3 square inches per 1/4 pound maximum, but probably less if you nest them a little as recommended. If you are serious about using gemstones for area coverage in a large mosaic, we strongly recommend first ordering a few units and making a prototype of your mosaic, maybe a small section 2 inches x 2 inches.

Compatibility

Gemstones can be used in mosaics with regular flat glass mosaic tile. Most pieces are fatter than 1/8-inch thick tile, and their raised rounded surfaces can add a dimensional element to an otherwise flat mosaic. However, thin pieces should be oriented so that they aren't covered by grout. You can use sand and glue to "shim up" thin pieces so that they are level with surrounding tile. If you are interested in using a lot of irregularly-shaped objects instead of flat tile, then consider using thinset mortar instead of glue. Thinset is sticky concrete, and you can press marbles and gemstones and other globular objects into it, which is a lot easier than trying to glue them to a flat surface.

Cutting

Cutting tumbled gemstones tends to mar their polished surfaces and is usually not done. We have cut some varieties of our gemstones in half with tile nippers and then glued them cut side down, which was conveniently flat. All that being said, the gemstones are different types of minerals, and some may be extremely hard or likely to shatter instead of cutting cleanly. As always, test your materials and methods before planning a large project around them.

Product Specifications

  • tumble-polished natural undyed gemstones.
  • material can vary by color and pattern.
  • 1/4 pound.
  • approximately 40 to 60 pieces per 1/4 pound.
  • Piece sizes range from approximately 1/2 to 3/4 inch.

More Information

For more information on how to design mosaics and use gemstones, tile and other vitreous materials 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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