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Diamond Painting Pro Tips Diamond painting can be tons of fun and it sure does bring out your creative best! Smith, Steven B. Luke , Jan 14, Read Article.
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This Month's Featured Gems. Fancy Color Diamond Dazzling brilliance. Emerald Emerald is the bluish green to green variety of beryl, a mineral species that includes aquamarine.
Citrine Citrine is the transparent, pale yellow to brownish orange variety of quartz. View the Gem Encyclopedia. A curated selection of engagement rings for those who desire a timeless ring that will embody their love forever.
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In some of the more politically unstable central African and west African countries, revolutionary groups have taken control of diamond mines , using proceeds from diamond sales to finance their operations.
Diamonds sold through this process are known as conflict diamonds or blood diamonds. In response to public concerns that their diamond purchases were contributing to war and human rights abuses in central and western Africa, the United Nations , the diamond industry and diamond-trading nations introduced the Kimberley Process in This is done by requiring diamond-producing countries to provide proof that the money they make from selling the diamonds is not used to fund criminal or revolutionary activities.
Although the Kimberley Process has been moderately successful in limiting the number of conflict diamonds entering the market, some still find their way in.
This is a stringent tracking system of diamonds and helps protect the "conflict free" label of Canadian diamonds.
Synthetic diamonds are diamonds manufactured in a laboratory, as opposed to diamonds mined from the Earth.
The gemological and industrial uses of diamond have created a large demand for rough stones. This demand has been satisfied in large part by synthetic diamonds, which have been manufactured by various processes for more than half a century.
However, in recent years it has become possible to produce gem-quality synthetic diamonds of significant size. The majority of commercially available synthetic diamonds are yellow and are produced by so-called high-pressure high-temperature HPHT processes.
Other colors may also be reproduced such as blue, green or pink, which are a result of the addition of boron or from irradiation after synthesis.
Another popular method of growing synthetic diamond is chemical vapor deposition CVD. The growth occurs under low pressure below atmospheric pressure.
It involves feeding a mixture of gases typically 1 to 99 methane to hydrogen into a chamber and splitting them to chemically active radicals in a plasma ignited by microwaves , hot filament , arc discharge , welding torch or laser.
A diamond simulant is a non-diamond material that is used to simulate the appearance of a diamond, and may be referred to as diamante.
Cubic zirconia is the most common. The gemstone moissanite silicon carbide can be treated as a diamond simulant, though more costly to produce than cubic zirconia.
Both are produced synthetically. Diamond enhancements are specific treatments performed on natural or synthetic diamonds usually those already cut and polished into a gem , which are designed to better the gemological characteristics of the stone in one or more ways.
These include laser drilling to remove inclusions, application of sealants to fill cracks, treatments to improve a white diamond's color grade, and treatments to give fancy color to a white diamond.
Coatings are increasingly used to give a diamond simulant such as cubic zirconia a more "diamond-like" appearance. One such substance is diamond-like carbon —an amorphous carbonaceous material that has some physical properties similar to those of the diamond.
Advertising suggests that such a coating would transfer some of these diamond-like properties to the coated stone, hence enhancing the diamond simulant.
Techniques such as Raman spectroscopy should easily identify such a treatment. Early diamond identification tests included a scratch test relying on the superior hardness of diamond.
This test is destructive, as a diamond can scratch another diamond, and is rarely used nowadays. Instead, diamond identification relies on its superior thermal conductivity.
Electronic thermal probes are widely used in the gemological centers to separate diamonds from their imitations. These probes consist of a pair of battery-powered thermistors mounted in a fine copper tip.
One thermistor functions as a heating device while the other measures the temperature of the copper tip: if the stone being tested is a diamond, it will conduct the tip's thermal energy rapidly enough to produce a measurable temperature drop.
This test takes about two to three seconds. Whereas the thermal probe can separate diamonds from most of their simulants, distinguishing between various types of diamond, for example synthetic or natural, irradiated or non-irradiated, etc.
Those techniques are also used for some diamonds simulants, such as silicon carbide, which pass the thermal conductivity test.
Optical techniques can distinguish between natural diamonds and synthetic diamonds. They can also identify the vast majority of treated natural diamonds.
Laboratories use techniques such as spectroscopy, microscopy and luminescence under shortwave ultraviolet light to determine a diamond's origin.
Several methods for identifying synthetic diamonds can be performed, depending on the method of production and the color of the diamond.
CVD diamonds can usually be identified by an orange fluorescence. Screening devices based on diamond type detection can be used to make a distinction between diamonds that are certainly natural and diamonds that are potentially synthetic.
Those potentially synthetic diamonds require more investigation in a specialized lab. Occasionally, large thefts of diamonds take place.
The gang broke through a perimeter fence and raided the cargo hold of a Swiss-bound plane. The gang have since been arrested and large amounts of cash and diamonds recovered.
The identification of stolen diamonds presents a set of difficult problems. Rough diamonds will have a distinctive shape depending on whether their source is a mine or from an alluvial environment such as a beach or river—alluvial diamonds have smoother surfaces than those that have been mined.
Determining the provenance of cut and polished stones is much more complex. The Kimberley Process was developed to monitor the trade in rough diamonds and prevent their being used to fund violence.
Before exporting, rough diamonds are certificated by the government of the country of origin. Some countries, such as Venezuela, are not party to the agreement.
The Kimberley Process does not apply to local sales of rough diamonds within a country. Diamonds may be etched by laser with marks invisible to the naked eye.
Lazare Kaplan , a US-based company, developed this method. However, whatever is marked on a diamond can readily be removed.
Diamonds have been treasured as gemstones since their use as religious icons in ancient India. Their usage in engraving tools also dates to early human history.
In , the French scientist Antoine Lavoisier used a lens to concentrate the rays of the sun on a diamond in an atmosphere of oxygen , and showed that the only product of the combustion was carbon dioxide , proving that diamond is composed of carbon.
From Wikipedia, the free encyclopedia. This article is about the mineral. For the gemstone, see Diamond gemstone. Allotrope of carbon often used as a gemstone and an abrasive.
The slightly misshapen octahedral shape of this rough diamond crystal in matrix is typical of the mineral. Its lustrous faces also indicate that this crystal is from a primary deposit.
Main article: Material properties of diamond. See also: Crystallographic defects in diamond. Main article: Diamond color.
Main article: Extraterrestrial diamonds. A round brilliant cut diamond set in a ring. Main article: Diamond gemstone.
Main articles: Diamond cutting and Diamond cut. See also: List of diamond mines and Exploration diamond drilling. Play media. Main articles: Kimberley Process , Blood diamond , and Child labour in the diamond industry.
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But that's how it always happens like with me". Eriksen described Blanco's style as "unorthodox, as he almost never plays the keyboards but throws in weird samples and alters them to the right pitch to go with the song.
After the song was completed, they wanted to play it to Rihanna, but Blanco was skeptical about the reaction towards the song because of its slow sound.
After StarGate played it to her, they called Blanco from London and told him that she liked the song: "She's flippin' out.
She played it like seven times in a row. It's her favorite song. She was recording in a separate part of the world, sending back the files, we're finishing the music and then we're mixing and mastering it, and then it was out in a few days.
It's fucking amazing and incredible. On September 12, , Def Jam France announced via Twitter that Rihanna would release a new single the following week and that her seventh studio album will be released in November.
However, the tweet was shortly deleted and replaced with another clarifying that more information will be given on September The lyrics are very hopeful and positive, but it's about love.
The single's cover artwork was revealed on September 24 and depicted Rihanna rolling diamonds in a manner suggestive of joint rolling. According to EMI Music Publishing 's digital sheet music for the song, "Diamonds" is composed in the key of B minor and set in common time signature, and has a moderately slow groove of 92 beats per minute.
In a positive review of the song, Robert Copsey of Digital Spy gave it four out of five stars and praised Rihanna's direction towards a "softer and more prolific edge".
Ernest Baker and Lauren Nostro of Complex ranked "Diamonds" atop their list of The 10 Best Guilty Pleasure Songs of and wrote that, although the song is unlike Rihanna's louder, more anthemic songs, "apparently the world loves to see a softer side of her, too.
Online 's reviewer named it the fifth best song of the year and said that Rihanna's vocal performance on the song validates the attention she had received since her breakthrough with " Umbrella ".
In the US, "Diamonds" debuted at number 16 on the Billboard Hot and sold , copies in its first week. Rihanna also passed Mariah Carey as the female artist to mark 12 number-one songs the fastest on the chart by achieving the feat in six years and seven months, which bested Carey's stretch of seven years, one month, and two weeks.
As a result, Rihanna became only the second artist of to top both the Billboard singles and albums charts simultaneously; the first to do so was English singer Adele.
On the Radio Songs chart, "Diamonds" debuted at number In its fourth week, it climbed to number ten, becoming Rihanna's 19th top ten, breaking a tie with Lil Wayne for the second-best sum in the list's year history; only Mariah Carey 23 has more.
Due to this, "Diamonds" saw a huge leap from number 66 to number one,  marking Rihanna's second single as a lead artist to top the chart;  it topped the chart for fourteen consecutive weeks.
Only Madonna has more In Canada, the song debuted at number nine on the Canadian Hot for the issue dated October 13, This gave Rihanna her seventh number-one single in the country.
With that, she became only the second artist to have four million-selling singles in the UK, only behind The Beatles , who have six. After eight weeks in the top ten, the song peaked at number two.
The song reached a peak of number six on November 4, Rihanna began to film the music video for "Diamonds" on October 21, , at the Mojave Desert in Lancaster, California.
Ethan Sacks of the New York Daily News remarked that she "looked like a gem on the set of her video shoot. You know 'Is she drowning, or is she in complete ecstasy?
Are those hands coming apart, or are they finding each other? The scenes were intercut with police officers who chase armed fighters. Rihanna stands in a deserted landscape in the video's other scenes.
The video was also made available for streaming at Rihanna. As the video progresses Rihanna is shown running on a highway. In a black-and-white scene, Rihanna licks the joint and begins smoking it.
The image fades to black as the song begins. Rihanna performs in the same black-and-white setting while in a black corset. Images of Rihanna on a bed in a room while singing are shown, with objects breaking, curtains falling and roses burning in reverse effect.
Rihanna is shown again on the highway, running away from what appears to be the headlights of a chasing car. She then stops as she looks up to the night sky at an aurora view.
Throughout the video, Rihanna's hand is shown intertwined with that of a heavily tattooed man, whose face is not shown in the video. As the second verse starts, Rihanna is shown in a desert where horses run freely.
Scenes of a street battle are later shown, depicting burning cars and broken glass around the environment. As the video continues, the singer and her lover's hands are shown slowly slipping apart, with only their fingertips touching towards the conclusion of the video.
The video ends with Rihanna once again floating alone in the open waters. James Montgomery of MTV News called it visually striking and observed a great deal of "evocative imagery glamorous black-and-white close-ups, thick plumes of translucent smoke, oversaturated hill-scapes, artfully silhouetted stallions ".
He said that, like the song, the video is by turns garish and very intimate. Online's Bruna Nessif said that the video shows an abundance of elaborate imagery, narratives, and especially a "mysterious and sexy" Rihanna.
Canada felt the video had failed to capture the song's vivid celebration of a love affair and stated, "It seems as though [Rihanna is] in chaos, reflecting on happier times.
Rihanna first performed "Diamonds" on November 7, , at the Victoria's Secret Fashion Show , where she wore black lingerie with black thigh high stockings and ankle boots; the show was aired by CBS on December 4.
New York magazine's Joe Reid said that her performance was the highlight of the show's episode and favored the digitized background in particular, which he described as "overt weirdness" that was ultimately "pretty endearing".
Lynch agreed with episode host Anne Hathaway , who had said that Rihanna was "a goddess. The performance featured the singer dressed in a black gown on a square platform.
As the chorus began, water effects poured down around her on the outside of the stage. By the final chorus, the water centered into the platform and wet the singer.
The performance featured the singer wearing a long black dress plunged down to her navel and diamond adornments in her hair. She was joined by an orchestra that included a conductor which accompanied her as a rock band produced the beat.
Kory Grow of Rolling Stone magazine labeled the performance as "stunning". Credits adapted from the liner notes of Unapologetic.
From Wikipedia, the free encyclopedia. They're afraid to embrace that and embrace themselves and love themselves and do what they love and do what makes them happy.
It features drums , heavy synthesizers , a s backbeat , orchestral sounds, and electronic rhythms accompanied with Rihanna's vocal performance. With 'Diamonds,' it was just a series of vignettes that we put together to help get the emotion across throughout the song 'cause the song changes and it builds, and there's no real way that you could do that.
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