Gemstone

A gemstone is a piece of mineral, which, in cut and polished form, is to make jewelry or other adornments. However, certain rocks and organic materials are not minerals, but are for jewelry, and are therefore often gemstones as well. Most gemstones are hard, but some soft minerals are in jewelry because of their luster or other physical properties that have aesthetic value. Rarity is another characteristic that lends value to a gemstone. Apart from jewelry, from earliest antiquity until the 19th century engraved gems and hard stone carvings such as cups were major luxury art forms the carvings of Carl Faberge were the last significant works in this tradition. The traditional classification in the West begins with a distinction between precious and semi-precious stones; similar distinctions are in other cultures. In modern usage, the precious stones are diamond, ruby, sapphire and emerald, with all other gemstones being semi-precious. Other stones are by their color, translucency and hardness. The traditional distinction does not necessarily reflect modern values, for example, while garnets are relatively inexpensive, a green garnet called Tsavorite, can be far more valuable than a mid-quality emerald. Another term for semi-precious gemstones used in art history and archaeology is hard stone. In modern times gemologists, who describe gems and their characteristics using technical terminology specific to the field of gemology, identify gemstones. The first characteristic a gemologist uses to identify a gemstone is its chemical composition. For example, diamonds are made of carbon and rubies of aluminum oxide. Next, many gems are crystals which are classified by their crystal system such as cubic or trigonal or monoclinic. For example diamonds, which have a cubic crystal system, are often as octahedrons. Gemstones are into different groups, species, and varieties. Ruby is the red variety of the species corundum, while any other color of corundum is sapphire. Emerald (green), aquamarine (blue), red beryl (red), goshenite (colorless), heliodor (yellow), and morganite (pink) are all varieties of the mineral species beryl. Gems are in terms of refractive index, dispersion, specific gravity, hardness, cleavage, fracture, and luster. They may exhibit pleochroism or double refraction. They may have luminescence and a distinctive absorption spectrum. There is no universally accepted grading system for gemstones. Diamonds are using a system developed by the Gemological Institute of America (GIA) in the early 1950s. Historically, all gemstones were using the naked eye. The GIA system included a major innovation: the introduction of 10-x magnification as the standard for grading clarity. Other gemstones are still using the naked eye. A mnemonic device, the color, cut, clarity and carat, has been to help the consumer understand the factors used to grade a diamond. With modification, these categories can be useful in understanding the grading of all gemstones. The four criteria carry different weight depending upon whether they are to colored gemstones or to colorless diamond. In diamonds, cut is the primary determinant of value, followed by clarity and color. Diamonds are to sparkle, to break down light into its constituent rainbow colors chop it up into bright little pieces and deliver it to the eye (brilliance). In its rough crystalline form, a diamond will do none of these things; it requires proper fashioning cut. In gemstones that have color, including colored diamonds, it is the purity and beauty of that color that is the primary determinant of quality. Physical characteristics that make a colored stone valuable are color, clarity to a lesser extent cut, unusual optical phenomena within the stone such as color zoning, and Astoria (star effects). The Greeks, for example, greatly valued Astoria in gemstones, which were as a powerful love charm, and Helen of Troy was to have worn star-corundum. Aside from the diamond, the ruby, sapphire, emerald, pearl and opal have also been precious. Up to the discoveries of bulk amethyst in Brazil in the 19th century, amethyst was a precious stone as well, going back to ancient Greece. Even in the last century, certain stones such as aquamarine, peridot and cat's eye have been popular as precious. Many gemstones are in even the most expensive jewelry, depending on the brand name of the designer, fashion trends, market supply, treatments etc. Nevertheless, diamonds, rubies, sapphires and emeralds still have a reputation that exceeds those of other gemstones. Rare or unusual gemstones, generally meant to include those gemstones, which occur so infrequently in gem quality that they are scarcely except to connoisseurs, include andalusite, axinite, cassiterite, clinohumite and red beryl. Gem prices can fluctuate heavily. In general, per carat, prices of larger stones are higher than those of smaller stones, but popularity of certain sizes of stone can affect prices.

Poker Omaha Hi-Low Split

Omaha Hi-Low Split

Omaha Hi-Low Split (8 or Better)

Omaha Hi-Low Split is a community card poker game that is played with a standard 52-card deck. In order for a hand to qualify for the low hand, it must contain an 8 or Better (lower) at showdown. The game starts to the left of the dealer button. The blind bets are made from the positions left of the dealer button and are forced bets which must be made before the cards are dealt.

Each player is dealt four cards, one at a time, in turn and face down (hole cards) as their initial hand. A round of betting occurs for players who are continuing to contend for the pot. Three board cards are turned face up (flop) in the middle of the table (community cards). The community cards are available for all players to use. The second round of betting occurs. The fourth community card is turned face up (the turn), followed by a third round of betting. A final community card (the river) is turned up and a fourth and final round of betting occurs. After the final round of betting has been completed, each player may use any two hole cards with three community cards to make the highest five-card poker hand, and any two hole cards with three community cards to make the lowest qualifying five-card poker hand. The lowest qualifying five-card poker hand is Ace, 2, 3, 4, 5. Players must qualify for the low hand with a hand containing an 8 or better (lower). The pot is split equally between the players with the highest ranking hand and lowest qualifying hand. If no player has a low qualifying hand, the player with the highest ranking five-card poker hand wins the entire pot. In the event of a tie, the pot, or portion of the pot, if the tie is for high or low hand only, is split equally.

When the Stakes Turn Toxic

Anyone who’s bought a lottery ticket or played bingo has gambled. Gambling is any game of chance in which money changes hands. It’s common in most cultures around the world. Many people enjoy gambling as recreation without causing harm to themselves or others. Yet some people can’t control their impulse to gamble, even when it takes a terrible toll on their lives.         

For these gamblers and their families, researchers have been making progress in several areas. Scientists are learning why people have problems with gambling: how common it is, what goes on inside the gambler’s brain, which is at risk and what kinds of treatment can help.

Problem gambling is defined by some researchers as gambling that causes harm to the gambler or someone else, in spite of a desire to stop. Between 2% and 4% of Americans struggle with this condition. Problem gambling can progress to a recognized psychiatric diagnosis called pathological gambling.

Pathological gambling may affect from 0.4% to 2% of Americans. “Pathological gambling comes with a constellation of problems that contribute to chaos,” says Dr. Donald Black of the University of Iowa. “It’s associated with worse physical health, excessive smoking, excessive drinking, not exercising, not seeing primary care doctors and worse dental care. It also fuels depression, family dysfunction, crime, bankruptcy and suicide.”

Together, pathological and problem gambling may affect up to 5% of Americans. That number may rise, though. Laws in many states are creating more options for legal gambling, and internet gambling is becoming more common.

Still, gambling is often done in family settings, condoned or encouraged by parents. And the younger you start, the more likely you are to get into trouble later on. From 3% to 8% of adolescents have a problem with gambling.

Dr. John Welte of the University of Buffalo has found that, across the lifespan, gambling problems are even more common than alcohol dependence. They are also much more common in males, in young people, and in people who live in relatively poor neighborhoods. “That’s not true of the prevalence of alcoholism,” says Welte. “Alcoholism is much more democratic. So think about motives for gambling. People are hoping that winning will improve their lot. That makes them more vulnerable to developing a gambling problem.”

In a study of mostly African-American inner-city youth, Dr. Silvia Martins of Johns Hopkins University has found that about 15% have some form of problem gambling. Most at-risk were adolescents and young adults who began showing symptoms of depression at age 12. They were highly impulsive, although not hyperactive or aggressive. As the African-American boys developed into their teens and early adulthood, gambling appeared to be a separate risk factor for early fatherhood and criminal arrest.

“We are following up with these inner-city kids every single year as they enter adulthood,” says Martins.

But why is gambling irresistible to some folks and not others? Using advanced imaging techniques, Dr. Alexander Neumeister of Mount Sinai School of Medicine looked at the brains of people with gambling problems and alcohol problems. He measured the number of special receptors involved in regulating impulse control and other factors.          

“A key feature of addiction is impaired impulse control,” says Neumeister. “Abnormal function of the forebrain leads to reduced tolerance to waiting.” The resulting impatience may cause people to act without considering the consequences. “Our imaging clearly points toward the importance of impaired forebrain function in addiction.”

Pinpointing areas in the brain’s reward center, Neumeister’s team found that people with alcohol addiction and gambling problems show different functioning of these special receptors compared to healthy people. The differences were related to the severity of addiction. Other researchers are trying to develop drugs that could treat the affected areas.

Talk therapy can also help. Dr. Nancy Petry at the University of Connecticut Health Center works with pathological gamblers and people seeking treatment for drug use disorders. Gambling problems arise in about 10% to 20% of substance abusers. Petry compared the use of different types of talk therapy, including very brief interventions and cognitive-behavioral therapy CBT. CBT teaches people how to think differently about problems and then act on that knowledge.

“We found very brief interventions and CBT were effective in reducing gambling and gambling-related problems,” Petry says. “There was a significant improvement relative to usual care or standard forms of treatment like Gamblers Anonymous [a 12-step program].”

Anybody can have a gambling problem, and no one should feel ashamed or be afraid to seek treatment. “Pathological gambling is a medical disorder, not a sin or a vice,” says Dr. Carlos Blanco of Columbia University and the New York State Psychiatric Institute. “There is no stereotype. The main predictor of outcome is really motivation.”

In other words, what counts most is a strong drive or desire to take action. Blanco offers gamblers motivational interviewing, which helps them explore their mixed feelings about trying to quit gambling. This primes them to be ready and willing to begin CBT. Using both therapies together can be very effective.

If you have concerns about your gambling, ask for help. Your health provider can work with you to find the treatment that’s best for you.

Billabong

Billabong is a mixed version of Manila. Each player is dealt two down cards and one upward. Low upward starts the betting with a Bring-in if you are playing with one, otherwise high card starts the betting. Next, two community cards are dealt, followed by a second betting round, beginning with the player with the best exposed partial poker hand counting the community cards, as in Oxford stud. Then a third community card is dealt, followed by a third betting round. Finally a fourth community card is dealt, followed by a fourth betting round and showdown. Each player plays the best five-card hand he can make from the three in his hand plus the four on the board in any combination.

Shanghai is the same game with an extra hole card, but no more than two hole cards play. That is, the game begins with each player being dealt three down cards and one upward; each player must discard one of his hole cards at some point during the game as determined ahead of time. The most common variation is to discard immediately as in Pineapple; the second most common is to discard just before showdown as in Tahoe.