Before the invention of coins, commerce depended on precious metals.

And so they're valuable. This is precious metals and gemstones.

There is the potential for oil and gas exploration, and of mining iron ore and precious metals.

Plutonium alloys can be produced by adding a metal to molten plutonium.

Gold is the most valuable of the metals.

Gold is more precious than any other metal.

Gold is the most precious of all metals.

Rubies are one of most beautiful gems in the world.

Another difficulty with using undifferentiated precious metals for exchange was that some trust or expertise was required to assure people that the metal was pure.

These layers are interleaved by layers of metal cations.

By contrast, African countries often see the worst sides of multinationals energy, mineral, and precious metal companies go where resources are, not where it s pleasant to work.

One in the UK in 1993 and one in 2012 in Israel.

There have been similar improvements across the board in metals mining and agriculture.

It's mostly many types of plastics and many types of metals.

In the summertime burning garbage spreads the stench, ashes contain heavy metal oxides.

The oldest stars contain few metals, whereas stars born later have more.

First, a global monetary system based on precious metals does not resolve the fundamental imbalances of a global economic system.

Among them a few precious icons, who previously where placed in the Annunciation Cathedral, whose frame is created, probably in Moscow.

Here, plants evolve that have resistance to high levels of metals in the soil.

But an utter lack of transparency allowed Russian companies, and their subsidiaries registered in third countries, to snap up most of the new offerings. Typical was the Russian holding company Promyslennye investory (Industrial Investors), which managed to get a major gold mine and then half of a plant producing gold alloys.

By September 1990, each of the metals had dropped in price chromium by 5 , tin by a whopping 74 .

These bases are poorly soluble in water and by their activity are close to the hydroxides of rare earth metals.

Recently some others, RbHPHO3, CsHPHO3, TlHPHO3 have been prepared by reacting phosphorous acid with the metal carbonate.

In most metals, the plasma frequency is in the ultraviolet, making them shiny (reflective) in the visible range.

That trade imbalance implied a continuous drain on gold and silver coin, causing shortages of these metals in Rome.

In 1928 he discovered the linear dependence of resistivity on magnetic field for various metals in very strong magnetic fields.

Population I stars Population I, or metal rich stars, are young stars with the highest metallicity out of all three populations.

Hence the proportion of metals can be an indication of the age of a star, with older stars typically having a lower metallicity.

After all, medieval alchemists engaged in what we now consider an absurd search for ways to transform base metals into gold.

For food safety, I recommend that the packaging of rice and flour all have the amounts of heavy metals in them on the package.

Near the melting point, the liquid plutonium has also very high viscosity and surface tension as compared to other metals.

Sterling silver is an alloy of silver containing 92.5 by mass of silver and 7.5 by mass of other metals, usually copper.

Over the course of the following centuries, metalworking rapidly developed in this region from the acquisition of the first metallurgical skills, to the creation of a full fledged industry.

The following metals can be found in the region zirconium dioxide (0.7 million tons), titanium dioxide (2.9 million tons), bauxite (2,068,000 tons), and tin (588,000 tons).

The ancient Greeks wore paste pendant earrings shaped like sacred birds or demigods, while the women of ancient Rome wore precious gemstones in their ears.

Of course, it is not just oil prices that are high, but all commodity prices, from metals to food to lumber.

Niobium, also known as columbium, is among the most utilized metals in the world, and Brazil has the great majority of the world's niobium deposits.

Online personality and social critic Xue Manzi suggested that labels should list the amount of heavy metals that the rice contains

Fiscal prudence and stable inflation rates are cornerstones of today s relatively healthy global economic environment. But for countries that have scope to invest more, particularly those that are holding a surfeit of precious development dollars in idle US Treasury bills, the time may be ripe to reassess the balance of risks.

A single standing EU army in lieu of Europe s largely irrelevant and inefficient national armed forces, with a budget of around 1 of EU GDP some 130 billion would instantly become the world s second leading military force, after the US, in terms of resources and, one would hope, capabilities. Assuming a flat rate of national contributions to the federal budget, Greece, for example, would shed 2 3 precious percentage points from its public deficit.

But for countries that have scope to invest more, particularly those that are holding a surfeit of precious development dollars in idle US Treasury bills, the time may be ripe to reassess the balance of risks.

The resistivity of plutonium at room temperature is very high for a metal, and it gets even higher with lower temperatures, which is unusual for metals.

I recall the very moment one day when I was searching for a pair of metals that would meet the constraints of earth abundance, different, opposite density and high mutual reactivity.

Over the years, with the looming possibility that the water contained heavy metals harmful to human health, the city s Ministry of Science and Technology committee prohibited the use of this wastewater for irrigation.

In January 1921, Schrödinger finished his first article on this subject, about the framework of the Bohr Sommerfeld effect of the interaction of electrons on some features of the spectra of the alkali metals.