reÂ·ticÂ·uÂ·late. adj. 1. Resembling or forming a net or network: reticulate veins of a leaf. 2. Relating to or being an evolutionary process that involves the exchange of genes between organisms of different species, as in the formation of a new species through hybridization.
Egypt is rich in building and decorative stone, copper and lead ores, gold, and semiprecious stones. These natural resources allowed the ancient Egyptians to build monuments, sculpt statues, make tools, and fashion jewelry. Embalmers used salts from the Wadi Natrun for mummification, which also provided the gypsum needed to make plaster.
Mohs scale hardness: 7. Onyx is a semi-precious gemstone made of silicon dioxide and belongs to the chalcedony family of colored quartz.ohs scale hardness: 7. Onyx is a semi-precious gemstone made of silicon dioxide and belongs to the chalcedony family of colored quartz.