The mineral zircon, known as zirconium silicate, is commonly found as a minor constituent in igneous rock such as granites and some kinds of metamorphic rock. Gem quality zircon stones are usually rare. These gemstones are formed mainly in pegmatites (coarse-grained igneous rock) and in fissures.
Temperature: A copse is flaccid immediately after death, muscle stiffening, rigor mortis, commences after about three to four hours, reaches maximum stiffness after 12 hours, and gradually dissipates until approximately 48 to 60 hours (two and a half days) after death.
2 doctors weighed in: How long does it take for rigor mortis to set in? 2 doctors weighed in. Want a second opinion? On average it commences after about three to four hours, reaches maximum stiffness after 12 hours, and gradually dissipates in approximately 48 to 60 hours. Time of onset is affected by activity before death, ambient temperature and ante-mortem diseases. On average it commences after about three to four hours, reaches maximum stiffness after 12 hours, and gradually dissipates in approximately 48 to 60 hours.