According to the Encyclopaedia Britannica, rubies are formed when the mineral corundum is exposed to chromic oxide in metamorphic environments between 1148 to 1238 degrees Fahrenheit. There are also two prominent methods of making synthetic rubies in a laboratory. The flame-fusion method produces a gem with notable imperfections. The flux-growth method produces a synthetic ruby that is nearly indistinguishable from a real one.Know More
Rubies are made from corundum or aluminum oxide. The corundum attains the distinctive ruby red color when chromium displaces some of the aluminum ions in the aluminum oxide; this process is called isomorphous replacement. Conditions of extreme pressure and heat in which hydrothermal fluids meet limestone are needed to create the metamorphic environment necessary to create rubies.
The flame-fusion method of creating rubies in a laboratory involves melting the essential elements and dripping the mixture onto a boule.The stone crystallizes in just a matter of hours. Because this technique leaves tiny gas bubbles and a glassy, unnatural appearance, the rubies it produces are inexpensive and mostly used as costume jewelry.
In the flux-growth method, jewelry makers melt the elements into a molten mix called a flux. The crystal takes six months to form under controlled-pressure conditions. Even their flux-rubies are not real, their authentic appearance gives them a high price -- up to $500 per carat.Learn more about Precious Metals & Gems
The Gemological Institute of America reports that rubies originated in Burma (modern-day Myanmar), based on historical references dating back to the 6th century during the Shan dynasty. The Mogok ruby mines were taken over by Burma's king in 1597.Full Answer >
Jasper stone is a type of gem that forms from quartz and chalcedony; it exists in a wide spectrum of colors, and appears in many areas around the world. Jasper's extraction and use dates back to the days of ancient civilizations, including the Persian Empire and Greece. Historically, it sees use as a building and decorative stone; jasper is used to create bowls, pottery and small objects and adorns interior and exterior spaces.Full Answer >
Burnishing refers to a metal finishing process that leaves the surface of a metal smoother and shinier. Burnished silver has this type of finish, making the appearance smooth and matte-like.Full Answer >
A stamp reading 18KGP means that the jewelry is gold plated, so an 18KGP white gold item would be plated with 18 karat white gold. The metal underneath the gold is usually copper or silver, but these can diffuse into the gold and tarnish the color.Full Answer >