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  2. Rutilated quartz - Wikipedia

    en.wikipedia.org/wiki/Rutilated_quartz

    Rutilated quartz is a variety of quartz which contains acicular (needle-like) inclusions of rutile. [1] It is used for gemstones. These inclusions mostly look golden, but they also can appear silver, copper red or black.

  3. Quartz - Wikipedia

    en.wikipedia.org/wiki/Quartz

    Quartz is, therefore, classified structurally as a framework silicate mineral and compositionally as an oxide mineral. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. [9] Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. The transformation ...

  4. Engineered stone - Wikipedia

    en.wikipedia.org/wiki/Engineered_stone

    The private Spanish company Cosentino brand Silestone and the public Israeli company Caesarstone are the most recognizable brands for quartz, as well as Totem Quartz, an Iranian company which has a huge market in the middle east and Central Asia. Gulfstone, an Oman-based company, is the only producer of engineered quartz stone in the GCC.

  5. Flake tool - Wikipedia

    en.wikipedia.org/wiki/Flake_tool

    Flake tools can teach us much about human history. Residue analysis can be done to learn what was processed by the flake tools. Use-wear analysis can give archaeologists an idea of what the flake tool was used for. Archaeologists also use a process called re-fitting. This is the technological process of putting rock shards back together in ...

  6. Sioux Quartzite - Wikipedia

    en.wikipedia.org/wiki/Sioux_quartzite

    Sioux Quartzite at Falls Park, Sioux Falls, South Dakota Cross-bedding in the Sioux Quartzite, Blue Mounds State Park, Minnesota, United States.. The Sioux Quartzite is a Proterozoic quartzite that is found in the region around the intersection of Minnesota, South Dakota, and Iowa, and correlates with other rock units throughout the upper midwestern and southwestern United States.

  7. Quartz-porphyry - Wikipedia

    en.wikipedia.org/wiki/Quartz-porphyry

    Quartz porphyry from the island of Alnö, Sweden. Phenocrysts of clear glassy rounded quartz and white orthoclase feldspar are set in a fine-grained matrix. Sample is just over 10 cm long. Quartz-porphyry, in layman's terms, is a type of volcanic rock containing large porphyritic crystals of quartz.

  8. Shocked quartz - Wikipedia

    en.wikipedia.org/wiki/Shocked_quartz

    Shocked quartz is a form of quartz that has a microscopic structure that is different from normal quartz. Under intense pressure (but limited temperature), the crystalline structure of quartz is deformed along planes inside the crystal.

  9. List of Saturday Night Live commercial parodies - Wikipedia

    en.wikipedia.org/wiki/List_of_Saturday_Night...

    Hallmark Channel Countdown to Christmas — A promo for the network's nearly round-the-clock block of wholesome holiday-themed films that was cut for time from a December 2017 episode. The ad checks off many of the tropes the films are famous for, including its use of familiar faces, Canadian locations , and similarly themed storylines ("It's ...

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