By: Kayla Chen
The stunning colors of a precious opal speak of its rarity. Precious opal gemstones are not found in many places in the world. Australia is home to 95% of the world’s deposit of opal. The special and specific conditions that led to the formation...
By: Gemma L. Reece
Highly valued as a construction, flooring and sculpture material since ancient times, most famously by the Ancient Greeks and Romans, marble is prized for its smooth, soft nature, its strength and purity; it can be found in many countries and is usually associated with refinement...
By: Blaise Pascal
Marble is a highly valued rock known for its strength, aesthetics, ability to be polished and resistance to most weathering. It has a variety of uses and has been used by current or ancient civilizations for building applications and statues. This material comes in a...
By: Blaise Pascal
Rubies are considered one of the most expensive and valued gems in the world. They are in the highest class of precious stones along with diamond and sapphire. Rubies have a high hardness and toughness which make them a good jewelry stone and are only...
What is the difference between a semi-precious stone and a gem?
By: Tamatha Campbell
What are precious and semi-precious gems? According to Galleries.com, gems are stones or stone-like items which are prized as ornaments, particularly for the fashioning of jewelry. Most gems are minerals such as diamonds, fluorite, and lapis lazuli. Some gems have biological origins, such as...
By: Blaise Pascal
Turquoise is quite possibly one of the oldest known gemstones. Pharaohs, early Native Americans, and the Aztecs Kings have all used and prized turquoise. The word turquoise has even become synonymous with that particular color of blue or colors of blue that are close to...
By: Michael Totten
In nature, emeralds are found as hexagonal beryl crystals which have a deep green color. An emerald, which is part of a lode or which has been worn down, may no longer appear hexagonal. Dark carbon impurities inside the crystal can also give the emerald...
By: Elizabeth M Young
The common term is "gemstone". Gemstones can be called precious, semi-precious or gems and can be composed of minerals, crystals or organic substances. Diamonds are crystalline, but can have minerals mixed in. Malachite is primarily a mineral that is a carbonite of copper. Amber is...
Why coral reefs are important
By: M. L. Kiser
You may have heard of the need to save the coral reefs. Many environmentalists and conservationists are working hard to fund research and to clean up the coral reefs so that they will continue doing their vital work for both the ocean and the land...
By: Norman Green
Stand upon a beach on the ocean shoreline and watch the waters. Dependent upon the time of day the sea will be either coming towards you or receding away from you. Stand and watch long enough and you will see the point where the movement...

 

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