Metals; Raw Metals And Precious Stones
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Book Metals Raw Metals And Precious Stones
Copyright reserved
The book cannot be previewed or downloaded in order to preserve the copyright of the author and publishing house
Not available digitally or on paper through the Noor Library, it is for rating and review
Metals; Raw Metals And Precious Stones
| Author: | Filip Simone |
| Category: | Gemology [Edit] |
| Language: | Arabic |
| Publisher: | عويدات للنشر والطباعة السلسلة: موسوعة كنوز المعرفة المصورة |
| ISBN: | 9789953282282 |
| Release Date: | 15 Aug 2017 |
| Pages: | 25 |
| Rank: | 341,854 No 1 most popular |
| Short link: | Copy |
| More books like this book | |
Book Description
الأحجار الكريمة أو الثمينة أو النفيسة أو التَبَر، هي أنواع مختلفة من المعادن المتبلمرة مركبة من عنصرين أو أكثر، وتتكون أساساً من مادة السليكا مع وجود بعض الشوائب المعدنية, ويختلف نوع الحجر الكريم باختلاف المادة المكونة بالإضافة إلى السليكا، وتتواجد عادة في مناطق الطمي البركانية، كالحصى البركانية.
هذا الكتاب يعرض لنا بعض أنواع المعادن والأحجار الكريمة، ويعرض تاريخ الذهب في العالم و التهافت عليه سنة 1848، و يوضّح قدرة الأحجار ومزاياها ويظهر جمالها الطبيعي كـ اللؤلؤ و ورود الرمال، وبلورات الدلول التي تشبه قشرات البيض، ويشرح أهمية المعادن لجسم الإنسان و أهم مصادرها في الغذاء. كتاب جميل يسافر معك في عمق جمال الطبيعة.
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