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2. Expansive clay - Wikipedia

   en.wikipedia.org/wiki/Expansive_clay

   Expansive clays have an expanding crystal lattice in a 2:1 ratio; however, there are 2:1 non-expansive clays. [2] Mitigation of the effects of expansive clay on structures built in areas with expansive clays is a major challenge in geotechnical engineering. Some areas mitigate foundation cracking by watering around the foundation with a soaker ...

3. Expanded clay aggregate - Wikipedia

   en.wikipedia.org/wiki/Expanded_clay_aggregate

   Lightweight expanded clay aggregate (LECA) or expanded clay (exclay) is a lightweight aggregate made by heating clay to around 1,200 °C (2,190 °F) in a rotary kiln. The heating process causes gases trapped in the clay to expand, forming thousands of small bubbles and giving the material a porous structure.

4. Metal clay - Wikipedia

   en.wikipedia.org/wiki/Metal_clay

   Metal clay is a crafting medium consisting of very small particles of metal such as silver, gold, bronze, or copper mixed with an organic binder and water for use in making jewelry, beads and small sculptures.

5. Jewellery - Wikipedia

   en.wikipedia.org/wiki/Jewellery

   Jewellery (or jewelry in American English) consists of decorative items worn for personal adornment such as brooches, rings, necklaces, earrings, pendants, bracelets, and cufflinks. Jewellery may be attached to the body or the clothes.

6. Clay - Wikipedia

   en.wikipedia.org/wiki/Clay

   Clay has a high content of clay minerals that give it its plasticity. Clay minerals are hydrous aluminium phyllosilicate minerals, composed of aluminium and silicon ions bonded into tiny, thin plates by interconnecting oxygen and hydroxide ions. These plates are tough but flexible, and in moist clay, they adhere to each other.

7. Quimbaya artifacts - Wikipedia

   en.wikipedia.org/wiki/Quimbaya_artifacts

   Map of pre-Columbian cultures Poporo Quimbaya in the Gold Museum, Bogotá Colombia Seated gold figure from the Museo de América (Museum of America). Quimbaya artifacts refer to a range of primarily ceramic and gold objects surviving from the Quimbaya civilisation, one of many pre-Columbian cultures of Colombia inhabiting the Middle Cauca River valley and southern Antioquian region of modern ...