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 are AMERICAN MADE and richer in color than Chinese gems, but they vary significantly in size and shape. Nominally 5/8 inch in diameter, these can run anywhere from larger than 1/2 inch to smaller than 3/4 inch. Their shapes are NOT always uniformly circular but are sometimes slightly elliptical. Sold by the 1/2 pound (approximately 50 to 60+ pieces). Click on a color to see the full product description.