The next best way is when you can see photos of the piece that you are going to buy from multiple directions with views that are close enough to see the flashing crystals. Some people like emeralds, the transparent, deep green stone from a. It is best to buy goldstone where you can inspect the rough from all angles in directional light. A gemstone's sparkle is measured by how much a ray of light bends when it passes. Slag, bubbles, and areas lacking flash will be unusable as "goldstone." Also, some goldstone only exhibits aventurescence from two directions instead of from all directions. So, if you are buying rough goldstone, pay attention to crystal size, the presence of areas without crystals, the presence of gas bubbles, and areas of slag. All of these areas are unsuitable for use, and any buyer who is paying by the pound should make sure that the price paid does not include the weight of useless material. Within a batch, the glass can have areas with few visible crystals, areas with numerous gas bubbles, and areas of slag.
Snuff Bottle with Aventurine Stopper, webpage on the Metropolitan Museum of Art website, last accessed October 2022. Murano, Its Glass and Its People, article on the Delaware Valley Paperweight Collectors Association website. Goldstone Amulet from 12th Century Iran, webpage on the Metropolitan Museum of Art website, last accessed October 2022.
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