Emerald Emerald Emerald is a gemstone and a variety of the mineral beryl (BeAl(SiO)) colored green by trace amounts of chromium and sometimes vanadium. Beryl has a hardness of 7.5–8 on the Mohs scale. Most emeralds are highly included, so their toughness (resistance to breakage) is classified as generally poor. Emerald is a cyclosilicate. The word "emerald" is derived (via and ), from Vulgar Latin: "esmaralda"/"esmaraldus", a variant of Latin "smaragdus", which originated in (smaragdos; "green gem"). Emeralds, like all colored gemstones, are graded using four basic parameters–the four "C"s of connoisseurship: "color", "clarity," "cut" and "carat weight". Normally, in the
Aquamarine Power Renewable Energy Association. It also got Innovation Award for Energy of the Engineer Technology and Innovation Awards 2009 and Scottish Green Awards for the Best Green Industry SME. In 2010 it was listed on GlobalCleantech 100 list. On 28 October 2015, BBC News reported that Aquamarine Power had called in administrators. No buyer was found and less than a month later, on 20 November, the company ceased to trade with the loss of fourteen jobs. Aquamarine Power Aquamarine Power was a wave energy company, which was founded in 2005 to commercialise a wave energy device concept known as the Oyster