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Agate (/ ˈ æ ɡ ɪ t / AG-it) is a variety of chalcedony, [1] which comes in a wide variety of colors. Agates are primarily formed within volcanic and metamorphic rocks.The ornamental use of agate was common in ancient Greece, in assorted jewelry and in the seal stones of Greek warriors, [2] while bead necklaces with pierced and polished agate date back to the 3rd millennium BCE in the Indus ...
Voltorb (/ ˈ v ɔː l t ɔːr b / ⓘ), known in Japan as Biriridama (Japanese: ビリリダマ), is a Pokémon species in Nintendo and Game Freak's Pokémon media franchise.First introduced in the video games Pokémon Red and Blue, they were created by Ken Sugimori, appearing in the earliest design document for the game.
Hardstone is a non-scientific term, mostly encountered in the decorative arts or archaeology, that has a similar meaning to semi-precious stones, or gemstones. [1] Very hard building stones, such as granite, are not included in the term in this sense, but only stones which are fairly hard and regarded as attractive – ones which could be used in jewellery.
Granite is a hard stone and requires skill to carve by hand. Until the early 18th century, in the Western world, granite could be carved only by hand tools with generally poor results. A key breakthrough was the invention of steam-powered cutting and dressing tools by Alexander MacDonald of Aberdeen , inspired by seeing ancient Egyptian granite ...
Mughal dagger hilt in jade with gold, rubies, and emeralds.. Hardstone carving, in art history and archaeology, is the artistic carving of semi-precious stones (and sometimes gemstones), such as jade, rock crystal (clear quartz), agate, onyx, jasper, serpentinite, or carnelian, and for objects made in this way.
Ganister – Hard, fine-grained quartzose sandstone, or orthoquartzite; Gossan – Intensely oxidized, weathered or decomposed rock; Hyaloclastite – Volcaniclastic accumulation or breccia; Ijolite – Igneous rock consisting essentially of nepheline and augite; Jadeitite – Metamorphic rock found in blueschist-grade metamorphic terranes
Springstone is an exceptionally hard, dark serpentinite stone used in Shona sculpture. [1] [2] Springstone is found in the Tengenenge region of Zimbabwe. [3] [4] The statue of Robert Mugabe at the State House in Harare was carved out of springstone using chisels and sandpaper. [5]
The holes are typically 1 ⁄ 4" to 3 ⁄ 4" in diameter and extend through a raised portion centered in the stone. They usually are bored all the way through but some have been found with holes that extend only part of the way through. Many are made from banded slate or other colored hard stone.