mercury thermometer

Mercury is the only one in liquid state at room temperature. It’s used in thermometers because it has high coefficient of expansion. Hence, the slightest change in temperature is notable when it’s used in a thermometer. It also has a high boiling point which makes it very suitable to measure higher temperatures.

You can identify the liquid in a thermometer based on its color. Silver liquid indicates that the thermometer contains mercury, while red liquid is alcohol to which red coloring has been added.

The alcohol thermometer or spirit thermometer is an alternative to the mercury-in-glass thermometer and has similar functions. Unlike the mercury-in-glass thermometer, the contents of an alcohol thermometer are less toxic and will evaporate quickly.

Objects That Can Float On Mercury This means that the density of mercury is approximately 13 times greater than that of water. Therefore, some objects that sink in water will float on mercury, including pieces of lead, silver and steel. However, pieces of gold sink, since gold has a higher density then mercury does.

Gold does not react with most chemicals but is attacked by chlorine, fluorine, aqua regia and cyanide and dissolves in mercury. In particular, gold is insoluble in nitric acid, which will dissolve most other metals. Nitric acid has long been used to confirm the presence of gold in items.

Musgravite

Diamonds are one of the most valuable precious stones around, but not because diamonds are especially rare. In fact, high-quality emeralds, rubies, and sapphires are all rarer in nature than diamonds.

Ammolite can come in any color in the rainbow but most are green and red. Blue and violet are rare and, typically, more valuable.

Strictly speaking the precious stones are only seven in number—the diamond, the pearl, the ruby, the sapphire, the emerald, the oriental catseye, and the alexandrite; but to these are often added the so-called semi-precious stones—such as the amethyst, the topaz, the tourmaline, the aquamarine, the chrysoprase, the …

The Most Expensive Gemstone in the World: The Blue Diamond

• Are worth $3.93 million per carat.
• Are rare to find in a flawless sample.
• Cause a huge stir in the jewelry industry when one goes to auction.

5 Most Precious Stones

1. Diamond. Diamonds are by-far the most popular precious stones.
2. Emerald. Emeralds are a rare variety of the mineral beryl.
3. Sapphire. Sapphires are one of the hardest stones on the planet; only diamonds surpass them in hardness.
4. Ruby. The cost of a ruby is primarily decided by its color.
5. Red Coral.

Are Rubies More Expensive Than Diamonds? Although some rubies are incredibly valuable and can command very high prices, most rubies are considerably less expensive than diamonds of the same size. This lower pricing makes a ruby an appealing alternative to a diamond for an engagement ring or other jewelry.

Emeralds are rarer and often more expensive than diamonds When it comes to rare and expensive gemstones, most of us immediately think of diamonds, but, in fact, emeralds are more than 20 times rarer than diamonds and, therefore, often command a higher price.

White Sapphire is the clear winner in terms of a natural diamond alternative. Those choosing White Sapphire should expect white sparkle only as compared with the white and colored sparkle diamond offers.

Moissanite. Moissanite is a form of silicon carbide and is usually produced synthetically. Because of its hardness (9.5 on the Mohs scale), it is perhaps the diamond imitation material that is closest to the real thing in terms of durability.

Diamonds are not particularly rare. In fact, compared to other gemstones, they’re the most common precious stone found. Generally, the cost per carat (or weight of a gemstone) is based upon a stone’s rarity; the rarer the stone, the more expensive.