Search results
Results From The WOW.Com Content Network
Chrysocolla has a cyan (blue-green) color and is a minor ore of copper, having a hardness of 2.5 to 7.0. It is of secondary origin and forms in the oxidation zones of copper ore bodies. Associated minerals are quartz , limonite , azurite , malachite , cuprite , and other secondary copper minerals.
Dioptase is popular with mineral collectors, and it is occasionally cut into small emerald-like gems. Dioptase and chrysocolla are the only relatively common copper silicate minerals. A dioptase gemstone should never be exposed to ultrasonic cleaning or the fragile gem will shatter.
A second variety of Guizotia abyssinica submitted to the U.S.D.A. for Plant Variety Protection (Application Number 200500140) called 'Earlybird 50' has a crop maturity of 50 days and is a shorter, more dense plant with a higher yield and is less susceptible to lodging than the 'EarlyBird' variety. Both varieties have short enough maturities to ...
Slice of Eilat stone. Eilat Stone (Hebrew: אבן אילת) is a gemstone that derives its name from the city of Eilat in Israel, where it was once mined.It is characterized by a green-blue heterogeneous mixture of several secondary copper minerals, including malachite, azurite, turquoise, pseudomalachite, and chrysocolla.
The larvae bore through roots, logs, stems, and leaves of various types of plants, ranging from trees to grasses. The wood boring types generally favor dying or dead branches on otherwise-healthy trees, while a few types attack green wood; some of these are serious pests capable of killing trees and causing major economic damage, such as the ...
In the treatment with the host plant, the fungi crossed the membrane and always emerged within 800 μm of the root, but not in the treatments with nonhost plants and dead plants. [ 25 ] Molecular techniques have been used to understand the signaling pathways between arbuscular mycorrhizae and plant roots.
In macrocyclic and demicyclic life cycles, the rust may be either host alternating (heteroecious) (i.e., the aecial stage is on one kind of plant but the telial stage on a different and unrelated plant), or single-host (i.e., the aecial and telial states on the same plant host). [3]
Like all members of the sunflower family, the flowering structure is a composite inflorescence, with rose-colored (rarely yellow or white) florets arranged in a prominent, somewhat cone-shaped head – "cone-shaped" because the petals of the outer ray florets tend to point downward (are reflexed) once the flower head opens, thus forming a cone ...