Gem Mineral
Gem Mineral
How to Take Care of Your Gems
Although gemstones are among the most durable of substances, they do need some care. Following a few general rules will make sure that they last for generations still looking like the day you bought them.
First of all: keep them clean! Rings in particular tend to collect dust and soap behind the stone, particularly if you wear them all the time. To clean transparent crystalline gemstones, simply soak them in water with a touch of gentle soap. If necessary, use a soft toothbrush to scrub behind the stone.
Even the hardest gemstone variety can be vulnerable to breakage if it has inclusions that weaken the crystal structure. Exercise common sense: if you have a ring set with a softer gem variety or an included stone, take it off before strenuous exercise.
Diamonds are very hard but can shatter in two with a single well-placed blow. Rubies and sapphires are the toughest gems but even they can chip if hit sharply.
Think twice before putting gems in an ultrasonic cleaner. Diamonds and rubies and sapphires will be fine but many other gems may not be: when in doubt, leave it out. Diamonds, rubies and sapphires, and other single-Crystal Gems can be cleaned with a touch of ammonia in water to remove all films and add extra sparkle.
Opaque gemstones like lapis lazuli, turquoise, malachite, require special care. Never use an ultrasonic cleaner and never use ammonia or any chemical solution. These gem materials should just be wiped clean gently with a moist cloth. These gemstones can be porous and may absorb chemicals, even soap, and they may build up inside the stone and discolor it.
The reason why these materials need more care than transparent gemstones is that these materials are essentially rocks, not crystals of a single mineral. Think about it: when you put a rock in water, it absorbs the water and is moist all the way through. A single crystal gem like sapphire will not absorb water: all the molecules are lined up so tightly in the crystal that there is no room for water to enter.
Opals also require special care. Never use an ultrasonic, never use ammonia, and avoid heat and strong light which can dry out the water in opals.
Organic gems like pearls, coral, and amber should only be wiped clean with a moist cloth. Due to their organic nature, these gems are both soft and porous. Be careful about chemicals in hairspray, cosmetics, or perfume: they can, over time, damage pearls in particular.
Store each piece of gemstone jewelry separately so that harder stones don't scratch softer ones. Almost every gemstone is much harder than the metal it is set in. Gems can scratch the finish on your gold, silver or platinum if you throw your jewelry in a heap in a drawer or jewelry box.
Courtesy of International Colored Gemstone Association (ICA)
About the Author
http://www.israelidiamond.co.il/English/index.aspx
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Minerals and Rocks Grade 4
Here is a exciting teaching plan for pupils concerned in learning about minerals, gems and rocks. It is targeted at assisting pupils presently in earlier courses, in particular 4th grade to practice basic scientific method while examining minerals, gems, and rocks, while being very hands-on and continuing attention and interest fully. The plan's a engaging and fun method to study about rocks, minerals, gemstones, geology, and also utilise the scientific method to address challenges.
You can easily compile a few easy-to-find items that are not hard to acquire. Some of these do not need to be purchased. This includes: Quarried stone, gravel, sand, salf, pieces of concrete, aluminum, and clay.
Rocks and Minerals Learning Education Designs
After the students have handled the rocks and minerals you request them to discuss the purposes of these items. Of course, there are umpteen uses such as structure for constructions and roads. Aluminum is used for soft drink containers, constructing materials, refuse cans and much more.
Moreover, humanity ingest minerals all day in the diet such as calcium, boron, copper, iron, chromium, iodine (iodine is supplemented to standard table salt to fight goiters), magnesium which is indispensable for neuromuscular action, potassium, phosphorus, zinc, selenium, and more.
Clay, of course, holds a very important ornamental use and this dates back long ago in history. In addition to being exploited for artistry, clay is also utilised in bricks and cat litter.
After analysing the uses of contrasting minerals, stones and rocks, you can convert the direction to the environment and how commerce get these familiar productions to people for use. The extraction, mining, and refining operations have numerous effects on society, the environment, and the local and worldwide economies. Talk about both the pros and cons to these impacts.
Teaching about the divergence about rocks and minerals
Another significant area for a rocks and minerals grade 4 module is to realise the primary fundamentals of rocks and minerals. Briefly, minerals are a uniform compound or atom, but then minerals are a combination of minerals.
You can likewise discuss the differences between the three types of rocks. These types are igneous, sedimentary, and metamorphic rocks - followed by a discussion about how these are interconnected.
Finally, the most important point is to focalize on the staples and let the pupils see, sense, interact with, and talk over the characteristics, functions, and implications on the world that minerals and rocks impart in all of these areas. Applying the contrasting teaching tools will insure that the most teaching is being attained and all learning ways are obliged.
About the Author
If you'd like to learn more about rocks and minerals, including books, information, and more simply head to <a href=http://rocksandmineralsforsale.com>Rocks and Minerals for Sale</a>.
Also, be sure to read about the <a href=http://rocksandmineralsforsale.com/Types-of-Rocks-and-Minerals.html>Types of Rocks and Minerals</a>.
