Gold mining companies are an investment method for gold. These do not represent gold at all, but rather are shares in gold mining companies. If the gold price rises, the profits of the gold mining company to rise and the share price may rise. However, there are many factors to take into account and share price may not rise when the gold price increases. Mines are commercial enterprises and subject to problems such as flooding, subsidence and structural failure, as well as mismanagement, theft and corruption. If serious, such factors can lower the share prices of gold mines. Unlike gold bullion, which is regarded as a safe haven asset, unhedged gold shares or funds are regarded as high risk and extremely volatile. This volatility is due to the inherent advantage in the mining sector. For example, if you own a share in a gold mine where the costs of production are $300 per ounce and the price of gold is $600, the mine's profit margin will be $300. A 10% increase in the gold price to $660 per ounce will push that margin up to $360, which actually represents a 20% increase in the mine's profitability, and potentially a 20% increase in the share price. Conversely, a 10% fall in the gold price to $540 will decrease that margin to $240, which actually represents a 20% fall in the mine's profitability, and potentially a 20% decrease in the share price. The amplification of gold mining profits during periods of rising prices can cause a gold rush in mining exploration. To reduce this volatility, some gold mining companies hedge the gold price up to 18 months in advance. This provides the mining company and investor with less exposure to short-term gold price fluctuations, but reduces potential returns when the gold price is rising.

Emeralds

Emeralds, like all colored gemstones, are graded using four basic parameters – the four Cs of Gemstones: Color, Cut, Clarity and Crystal. The last C, crystal is a synonym that begins with C for transparency or what gemologists call diaphaneity. Before the 20th century, jewelers used the term water as in a gem of the finest water to express the combination of two qualities, color and crystal. Normally, in the grading of colored gemstones, color is by far the most important criterion. However, in the grading of emerald, crystal considered a close second. Both are necessary conditions. A fine emerald must possess not only a pure verdant green hue as described below, but also a high degree of transparency considered a top gem. In the 1960s, the American jewelry industry changed the definition of emerald to include the green vanadium-bearing beryl as emerald. As a result, vanadium emeralds purchased as emeralds in the United States recognized as such in the UK and Europe. In America, the distinction between traditional emeralds and the new vanadium kind reflected in the use of terms such as Colombian Emerald. Scientifically speaking, color divided into three components: hue, saturation and tone. Yellow and blue, the hues found adjacent to green on the spectral color wheel, are the normal secondary hues found in emerald. Emeralds occur in hues ranging from yellow-green to blue-green. The primary hue must be green. Only gems that are medium to dark in tone considered emerald. Light-toned gems known by the species name, green beryl. In addition, the hue must be bright (vivid). Gray is the normal saturation modifier or mask found in emerald. A grayish green hue is a dull green. Emerald tends to have numerous inclusions and surface breaking fissures. Emerald graded by eye. Thus, if an emerald has no visible inclusions to the eye it considered flawless. Stones that lack surface breaking fissures are extremely rare and therefore almost all emeralds are treated, oiled, to enhance the apparent clarity. Eye-clean stones of a vivid primary green hue with no more than 15% of any secondary hue or combination of a medium-dark tone command the highest prices.6 This relative crystal non-uniformity makes emeralds more likely than other gemstones to be cut into cabochons, rather than faceted shapes.