It is on the list of birthstones by month as both a May and June birthstone. Chrysoprase has a hardness of 6ï¾–7 on the Moh's hardness scale. Agate, carnelian and onyx are other examples of the cryptocrystalline family. Chrysoprase is cryptocrystalline, which means it is composed of crystals so fine, they are not able to be seen by the naked eye, unlike amethyst, citrine and other kinds of crystalline quartz. These days, the green apple colored variety of chrysoprase is the color most commonly found. Analytical results in the absence of a vortex breaker show that the effects of the Weber and Reynolds numbers in the flow field can be ignored for values greater. Chrysoprase is the most valuable gemstone in the chalcedony family and used to be mistaken for emeralds by ancient jewelers. The focus of the present study is to investigate the effectiveness of installing vortex breakers at the outlet of launch vehicle tanks on postponing vortex formation and decreasing the critical height of propellants while discharging. Pieces of this stone are often very beautiful as the nickel inclusions create lovely patterns in the stone. The amount of nickel present causes a beautiful variety of colors, ranging from a pale yellow to a light to dark green. While emeralds get their green color from the presence of chromium, the bright, spring green color of chrysoprase is a result of the presence of nickel. In the Australian deposits, chrysoprase occurs as veins and nodules with brown goethite and other iron oxides in the magnesite-rich saprolite below an iron and silica cap.Chrysoprase is a green colored gemstone variety of chalcedony. Chrysoprase results from the deep weathering or lateritization of nickeliferous serpentinites or other ultramafic ophiolite rocks.
It owes its bright apple-green colour to.
The nickel reportedly occurs as different silicates, like kerolite or pimelite. chrysoprase, brittle, translucent, semiprecious chalcedony (q.v.), a variety of the silica mineral quartz. Unlike emerald which owes its green color to the presence of chromium, the color of chrysoprase is due to trace amounts of nickel compounds in form of very small inclusions. calcedony, chalcedony - a milky or greyish translucent to transparent quartz. The word chrysoprase comes from the Greek χρυσός chrysos meaning 'gold' and πράσινον prasinon, meaning 'green'. chrysoprase - a green variety of chalcedony valued as a gemstone. You'll need to wake up your fellow passengers, manage your oxygen, and. Unlike many non-transparent silica minerals, it is the color of chrysoprase, rather than any pattern of markings, that makes it desirable. In CryoSpace, your ship's colonization mission has gone wrong, and you've been woken up first. Other members of the cryptocrystalline silica family include agate, carnelian, and onyx. This sets it apart from rock crystal, amethyst, citrine, and the other varieties of crystalline quartz which are basically transparent and formed from easily recognized six-sided crystals. The darker varieties of chrysoprase are also referred to as prase.Ĭhrysoprase is cryptocrystalline, which means that it is composed of crystals so fine that they cannot be seen as distinct particles under normal magnification.
Its color is normally apple-green, but varies to deep green. Freebase (0.00 / 0 votes) Rate this definition:Ĭhrysoprase, chrysophrase or chrysoprasus is a gemstone variety of chalcedony that contains small quantities of nickel.
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