| Class: | 5C |
| Name: | Chiu Yuen Tung |
| Year: | 2017 – 2018 |
| 地質年代：(化石) (岩石)
化學組成, 鍵及結構：(礦物)
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Geological Age: (Fossil) (Rock)
Chemical composition, bonding and structure: (Mineral)
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| 形成：(岩石) (礦物)
由藍綠藻產生的微晶灰殼,潮間帶和潮上帶(平均高潮線與最大漲潮線之間的區域)沉澱的碳酸鹽,鈣質和洞穴珍珠所形成的 不規則的微型晶體與纖維狀方解石一層層地圍着核 原生物：(化石)
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Formation:(Rock) (Mineral)
irregular concentric micritic to fibrous calcite layers, form by micrite encrustations produced by blue-green algae, intertidal and supratidal precipitation of carbonate, caliche, cave pearls, about a nucleus Living Specimens: (Fossil)
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| 特性：
由凝固的顆粒組成
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Properties:
Made up of concretionary grains
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| 用途：(岩石) (礦物)
研究及觀賞
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Application: (Rock) (Mineral)
For researching and seeing
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| 分佈：(岩石) (礦物)
平坦的海岸地區, 潮汐帶
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Distribution: (Rock) (Mineral)
Gentle relief coastal area, between the tidal range
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| 知多一點點：
可以有不同顏色 |
More to learn:
Can have different colour |