0
Gems and Precious Stones
Gems and precious stones are cut or polished minerals used to create jewelry, accessories and other ornaments. Some of the most popular precious stones include amethyst, aquamarine, diamond, emerald, opal, ruby, sapphire, topaz, and turquoise.
1,193 Questions
Which diamond has the highest carat of shine?
This question doesn't quite make sense. A carat is a measure of the weight of the diamond, and measures nothing else at all. One carat = 200 mg or 1/5 of a gram. By 'shine' you probably mean brilliance; this can be measured by the return of light from the diamond. Clarity and colour both mean what they say, and don't really affect brilliance, which depends entirely on the cut. The cut which gives the most brilliance is known as the ideal cut.
What are considered semi precious stones?
Semi precious-stones are generally considered to be any gemstone in a cut or polished form that is not a diamond, emerald, ruby or sapphire (as these four stones are considered to be precious stones). it all about the values and values depend upon many factors. factors are color,clarity , availability etc
you can check on any ecommerce portal like www(dot)gempundit(dot)com
How do you determine the birefringence of any minerals?
Birefringence of minerals can be determined by measuring the difference in refractive indices in different crystal directions. This is typically done using a polarizing microscope equipped with conoscopic or interference filters to reveal interference colors. The interference colors observed can then be used to calculate the birefringence of the mineral.
Does real pearl sink in the water?
I have never heard of Pearls sinking in water. But they say if you put a pearl in a clear glass of water and place it in the moon light, if the pearl is real it will reflect the light. There are some more test to differentiate between real and fake pearls: One of the easiest way to notice which one of them are fake is that, by rubbing both pearls together. Here you would need to take notice of two things. 1. When rubbing two pearls together, you would feel a friction between two pearls. If you were to rub 2 plastic together there wouldn't be any friction between them.
2. If you noticed when you rub the pearls together a small spec of the pearls would have come off and it would end up having scratches. 3.But if you rub over the scratch area of the pearl. The scratch marks would be gone, and the pearls would looked as if nothing happened to it. That my friends is how you can tell if your pearls are genuine.
Another way to determine to see your pearls are real is by burning the pearls itself with fire. Take a lighter and burn the pearl. Pearls are fire resistant, or they will never melt to put it that way. But if burn marks do appear on the pearl itself, just rub over the burnt marks and it would disappear just like that. Rub the pearl across the front of your upper teeth. It may sound strange, but real pearls will feel rough or gritty while fake ones will feel smooth. This is due to the micropores found on the genuine article.
I hope that with these simple methods will help you to be able to tell a difference between real pearls with fake one as well.
It depends. All gemstones other than pearls and opals are crystals, but most crystals are not gemstones.
Are blue diamonds called sapphires?
No.
Blue diamonds are formed from carbon and contain trace amounts of boron.
Sapphires are formed from corundum, an aluminium oxide (α-Al2O3). Not all sapphires are blue.
Yes, cubic zirconia is a synthetic gemstone that is created in laboratories. It is made by melting zirconium oxide with stabilizers to create a crystal that closely resembles a diamond but is more affordable.
Emerald is a gem, and is a mineral called beryl. It is a beryllium aluminum silicate, and it has a bit of the element chromium (and sometimes vanadium) in it that gives it its characteristic green (or bluish-green) color. Got a link to the Wikipedia article on the emerald so you can click on it and surf on over. Why not check out the cool pics and get more info?
Is man made diamond as strong as real diamond?
Yes, man-made diamonds have the same chemical composition and structure as natural diamonds, making them equally strong. Both types of diamonds are composed of carbon atoms arranged in a crystalline structure, which gives them their hardness and strength.
What does precious stone mean?
I can only think of three; ruby, jade and opal.
is this binweevils right, ... well it could be any four letter word.... stones... so do the down first so you get the first letter of the stone... is it the crosswords......
Onyx
What stone is more expensive than diamonds?
Some natural gemstones of good quality are found in colors and sizes so rare they are eagerly sought-after by jewelers and collectors. Some of these precious stones have unusual properties that add to their value, such as the way they capture and reflect light, change color in certain light, or have unique crystal formations within their structure. Here are some examples of gemstones that have rare and unusual characteristics that often make them more valuable than diamonds. An emerald that is the right shade of green can be more valuable than a diamond. Tanzanite, mined in Tanzania, cornflower color beautiful stones; Tanzanites that are deep blue with no purple shade and are very very dark, high in quality can be a lot expensive than a diamond. Alexandrite, is a unique crystal that changes color in different light. It is also very scarce, because Alexandrite was formed under extraordinarily rare geologic conditions, where different types of rocks that normally do not coexist were brought into contact with each other, allowing the crystals to grow.
While there are slight differences between the Brazilian and Russian types, any finely faceted specimen over a carat is rare and expensive-especially if it is from a Russian source-and its color change should be dramatic, with no hints of brown or grey coloring.
Demantoid Garnet, While there are many kinds of garnets in the world, some are highly prized for special features. The green colored garnet called "demantoid," from the Ural Mountains of Russia and mines of Namibia, is more refractive than a diamond when faceted. The high refractive index of garnets in general sets them apart from other gemstones, but the demantoid is especially brilliant. Its green color can vary from yellowish- to bluish-green, with deep green being extremely rare, and while most demantoids after cutting are less than a carat, and rarely larger than two carats, this stone's brilliance and fire is unmatched, regardless of the shade of green. The demantoids from the Urals have a rare feature not found in African demantoids-fine, wispy crystal deposits of chrysotile, called "horsetail inclusions." Not only will well-formed horsetail inclusions increase the value of this super-brilliant stone, but their presence is an indisputable marker of the stone's origin.
Ruby, It is very rare to find large pieces of raw, uncut ruby that have no fissures or cracks. Therefore, any piece over 3 carats is highly prized and could bring more at auction than a diamond of similar weight. The main indicator of value with rubies is the color, which can range from the top-quality "Burmese color" red, which has a bluish tinge, to the deep red "Siamese color" or the light red Ceylon ruby color. The most prized of all, though, would be a rare star ruby. In this stone, the mineral rutile forms the star-shaped deposit in the stone, and when expertly cut, is very valuable. Blue Sapphire, it is the deep blue, fancy cut sapphires that command a premium in the sapphire trade. While blue sapphires are mined in eastern Australia, Thailand, Colombia, Africa and places in the U.S., such as Montana, Ceylon sapphires (from Sri Lanka) are most respected and prized, and compared to Earth's diamond deposits, sapphires are much more scarce. Kashmir color sapphires, a rare blue color akin to those found in the original Kashmir mine of India where these gems were first discovered, are bought and sold today in Sri Lanka. Remarkable specimens of untreated blue or Kashmir color sapphires over 4 carats are investment grade and are most likely obtained through special dealers or at auction.
How do you sell precious gem stones?
The internet like eBay and such, and sometimes you can get lucky and find a geology stand at a craft show or something.
I once bought a raw, uncut emerald at a craft show for $25.00
On the internet for loose stones, from someone who has them, in stores like jewelers or department stores for gemstone jewelry.
There are many kinds of precious stones: diamond, ruby, to name just two.
What are the properties of Opal?
Opal is a amorphous mineraloid composed of hydrated silica. It is known for its unique play-of-color, which is caused by the diffraction of light by silica spheres within the stone. Opal is relatively soft, with a hardness of about 5.5-6.5 on the Mohs scale, making it susceptible to scratching and chipping.
How much is 1 carat of amethyst worth?
Highly variable, depending on shade of purple, evenness of color, lack of flaws and inclusions and, to a certain degree, locality. Could vary from $5 a carat to over $50 a carat, if the stone is large and fine.
What are Semi precious stones of Oregon?
semi precious stones in different forms like cut stones, natural gemstones, beads, layout earrings, chips, necklace forms, faceted stones, cabochon stones, rondelles, agate beads and many others. Amethyst, aquamarine, chalcedony, citrine, garnet, iolite, moonstone, peridot and many more stones are available in faceted and cabochons.
Opal is commonly used in jewelry as gemstones due to their unique play-of-color. They are also used in metaphysical practices for emotional healing and enhancing creativity. In industry, opals are used as abrasives and in scientific instruments for their optical properties.
How much the green amethyst is worth?
Green color amethysts have been found in the Zimbabwe and Arizona and are said to get the color due to the heat of the sun. These are mainly purple color gems that change color due to the excessive heat and the gem is found in a combination of green and purple color. They are not very valuable.
What is the streak color of a crystal?
The streak color of a crystal is also called the powder color: the color of the grains produced when it is dragged along a hard flat, white surface.
Aquamarine is a semi-precious stone that is considered a common gemstone.
How is topaz used in today's world?
Topaz is primarily used as a gemstone in jewelry, known for its striking blue color. It can also be used in industrial applications, such as in electronics and healthcare for its thermal and electrical properties. Additionally, topaz is sometimes used in spiritual practices for its believed healing properties.
Which is an element - ruby sapphire emerald diamond?
The two main elements present in a red ruby--aluminium and oxygen. This is actually the exact same main elements found in a sapphire, which has the same chemical composition but simply differs in colour which is caused by traces of a different elements (iron, titanium) which causes it to be blue versus a rubies red colour. The red colour of the ruby is due to traces of chromium in the aluminum oxide. Corundum (the aluminum oxide base of these gems) can be turned blue, yellow, pink, purple, orange, greenish or pink-orange by the impurities.
