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2. What's the Difference Between Quartz and Quartzite? - AOL

   www.aol.com/whats-difference-between-quartz...

   Quartz countertops come in even more color and patterns because it’s an engineered stone. “Being manmade, the patterns and the colors and all that are designed by the manufacturer,” Chadha ...

3. Quartzite - Wikipedia

   en.wikipedia.org/wiki/Quartzite

   Quartzite can have a grainy, glassy, sandpaper-like surface. Quartzite is a hard, non-foliated metamorphic rock which was originally pure quartz sandstone. [1] [2] Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts.

4. 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. [10] Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. The transformation ...

5. Dumortierite - Wikipedia

   en.wikipedia.org/wiki/Dumortierite

   Substitution of iron and other tri-valent elements for aluminium result in the color variations. It has a Mohs hardness of 7 and a specific gravity of 3.3 to 3.4. Crystals show pleochroism from red to blue to violet. Dumortierite quartz is blue colored quartz containing abundant dumortierite inclusions.

6. How to Clean Quartz, Granite, Marble, and Butcher Block ...

   www.aol.com/lifestyle/clean-quartz-granite...

   Pretty, glossy, and stain resistant, this natural stone remains the go-to countertop for home buyers and remodelers. While both granite and quartz up a home’s elegance, there’s a big ...

7. Citrine (colour) - Wikipedia

   en.wikipedia.org/wiki/Citrine_(colour)

   Citrine / ˈ s ɪ t r iː n / is a colour, the most common reference for which is certain coloured varieties of quartz which are a medium deep shade of golden yellow. Citrine has been summarized at various times as yellow, greenish-yellow, brownish yellow or orange. [2] The original reference point for the citrine colour was the citron fruit.