| 31. | In 1860 the Croydon Reef was discovered and quartz mining commenced.
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| 32. | Minerals in this series include zeolites, albite, and quartz.
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| 33. | The most common stable mineral in siliciclastic sedimentary rocks is quartz.
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| 34. | In early seasons Magnum also wore a Chronosport Sea Quartz 30.
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| 35. | The quartz wedge or selenite plate enables us to do this.
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| 36. | The sand is predominantly quartz giving it a light coloured appearance.
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| 37. | The tools are Olduwan-like and mainly made of quartz.
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| 38. | Quartz and feldspar increase in size and abundance yoward the top.
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| 39. | It's used in Quartz and Transparency ( optics ).
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| 40. | Later Ophir became the center of quartz mining in the county.
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