Rock & Gem Kids is a monthly feature that offers articles, puzzles, and a quiz with prizes for junior rockhounds. The Quiz 1. In a penetration twin, two crystals are intergrown. 2. Two famous international locations for choice fluorite are the Swiss Alps and Weardale, England. 3. A flux helps lower the melting point of...
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Rock & Gem Kids is a monthly feature that offers articles, puzzles, and a quiz with prizes for junior rockhounds. The Quiz 1. Granite has a characteristic coarse-grained texture because of slow cooling . 2. The primary mineral components of granite are quartz, feldspar, mica and hornblende . 3. The mammoth’s central nasal cavity is probably what...
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Rock & Gem Kids is a monthly feature that offers articles, puzzles, and a quiz with prizes for junior rockhounds The Quiz 1. Chrysocolla is sometimes considered a “mineraloid”, rather than a “true mineral”. 2. An “oxidation zone” is created when oxygen-rich groundwater seeps into rocks containing copper. 3. Chrysocolla becomes “agatized” when it is...
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Rock & Gem Kids is a monthly feature that offers articles, puzzles, and a quiz with prizes for junior rockhounds. QUIZ ANSWERS 1. The mineral gypsum is softer than your fingernail. 2. “Hourglass” selenite can only be found in Oklahoma. 3. Temperatures between 129°F and 136°F are required for selenite crystals to form. 4. The beryl...
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Rock & Gem Kids is a monthly feature that offers articles, puzzles, and a quiz with prizes for junior rockhounds. QUIZ ANSWERS 1. Beryl and tourmaline are members of the cyclosilicate group of minerals. 2. Pink beryl is known by the varietal name morganite. 3. Blue and yellow beryl get their color from iron ions. 4....
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Rock & Gem Kids is a monthly feature that offers articles, puzzles, and a quiz with prizes for junior rockhounds. QUIZ ANSWERS 1. The “topaz” mined on Topazios was actually olivine. 2. Sources of fine blue topaz in the United States are Pikes Peak, Colorado, and Pala, California. 3. The cat’s-eye effect is caused by...
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Rock & Gem Kids is a monthly feature that offers articles, puzzles, and a quiz with prizes for junior rockhounds. QUIZ ANSWERS 1. Borate minerals are used to produce borax for laundry detergent. 2. Fibrous crystal bundles give blocky masses of white ulexite a soft, satin luster. 3. Name three elements present in ulexite’s chemical formula. sodium, calcium,...
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Rock & Gem Kids is a monthly feature that offers articles, puzzles, and a quiz with prizes for junior rockhounds. QUIZ ANSWERS 1. Marl is a sandy silt that is rich in phosphate and calcium carbonate. 2. The Dinosaur Wars were carried out between Edward Drinker Cope and Othniel Charles Marsh. 3....
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Rock & Gem Kids is a monthly feature that offers articles, puzzles, and a quiz with prizes for junior rockhounds. QUIZ ANSWERS 1. Barite often precipitates out of groundwater, but it also forms in hydrothermal settings. 2. Barite is found in the American states of Colorado, South Dakota, and Oklahoma. 3. A “barium shake” is used in...
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Rock & Gem Kids is a monthly feature that offers articles, puzzles, and a quiz with prizes for junior rockhounds. QUIZ ANSWERS 1. “Evaporite” minerals form as the water in shallow lakes dries up. 2. Pure halite is colorless and pink halite is colored by algae. 3. Halite is still forming at Searles Lake, California. 4. Most...
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