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  2. Reef knoll - Wikipedia

    en.wikipedia.org/wiki/Reef_knoll

    A bioherm is a landform of organic sedimentary rock enclosed or surrounded by rock of different origin. [2] A biostrome is a distinctly bedded or broadly lenticular sedimentary rock landform. [ 3 ] Krumbein additionally used these terms to distinguish different shapes of stromatolites : "Distinctly bedded, widely extensive, blanketlike build ...

  3. Stromatolite - Wikipedia

    en.wikipedia.org/wiki/Stromatolite

    Fossilized stromatolites exhibit a variety of forms and structures, or morphologies, including conical, stratiform, domal, columnar, [13] and branching types. [14] Stromatolites occur widely in the fossil record of the Precambrian but are rare today. [15]

  4. Granulation (jewellery) - Wikipedia

    en.wikipedia.org/wiki/Granulation_(jewellery)

    There are three basic techniques that may be used to attach granules to a metal surface: hard soldering, fusing and colloidal soldering. The metals used in granulation are usually gold and/or silver alloys of high purity – alloys below 18 kt. gold and sterling silver being unsuitable. With each technique, the process begins with the making of ...

  5. List of fossil stromatolite taxa - Wikipedia

    en.wikipedia.org/wiki/List_of_fossil...

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  6. Gemology - Wikipedia

    en.wikipedia.org/wiki/Gemology

    Examining a pink sapphire under a gemmological microscope. Gemology or gemmology is the science dealing with natural and artificial gemstone materials. It is a specific interdisciplinary branch of mineralogy.

  7. Spongiostromata - Wikipedia

    en.wikipedia.org/wiki/Spongiostromata

    "Spongiostromata" is an antiquated form taxon that refers primarily to fossil cyanobacteria. "Spongiostromate" is also used to describe stromatolites and oncolites that do not preserve clear tubules or other cellular microstructure.

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