What makes the gemstone ruby red?

Chromium is the trace element that causes ruby’s red, which ranges from an orangy red to a purplish red. The strength of ruby’s red depends on how much chromium is present—the more chromium, the stronger the red color. Chromium can also cause fluorescence, which adds to the intensity of the red color.

Why are some rubies redder than others?

The chromium atoms in rubies absorb light wavelengths. When they reflect light in the visible light spectrum it appears as a different color.

Are red rubies rare?

As most rubies form as small crystals it is rare to find gem-quality rubies over ten carats.” … “Ruby is the red variety of corundum—as sapphire is for blue. It is quite a bit rarer than the blue gems. The rarity combined with the demand for rich red gems keeps the price very high.”

How do you tell if a ruby is real?

Use the ruby to scratch a hard, smooth surface, such as a piece of glass. If there is a streak of red color left behind on the surface, then it is clear that your stone is a fake. A real ruby will never leave color in that way.

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How do you know if a ruby is real or fake?

Real rubies glow with a deep, vivid, almost “stoplight” red. Fake gems are often dull: they are “light, but not bright.” If the gem is more of a dark red, then it may be garnet instead of a ruby. If it is a real ruby, however, know that darker stones are usually worth more than lighter stones.

How can you tell a good quality ruby?

The finest ruby has a pure, vibrant red to slightly purplish red color. In most markets, pure red colors command the highest prices and ruby with overtones of orange and purple are less valued. The color must be neither too dark nor too light to be considered finest quality.

Are rubies naturally red?

A ruby is a pink-ish red to blood-red colored gemstone, a variety of the mineral corundum (aluminium oxide). Ruby is one of the most popular traditional jewelry gems and is very durable. Other varieties of gem-quality corundum are called sapphires.

Ruby
Common impurities Cr. (sometimes :Ti, Fe)
References

What is Burmese ruby?

The Burmese ruby is one of the most valuable variations of the corundum mineral family. … The Burmese ruby, however, is a piercing bright red, sometimes referred to as “pigeon’s blood”. All rubies owe their coloring to the element chromium and the intensity of that color depends on the amount of chromium exposure.

Are purple rubies real?

Some rubies mined from specific parts of the world are known to have certain secondary colors, such as rubies from Myanmar, which are known to have a slight purple secondary color. Purple as a secondary color can actually be better in a ruby because it makes the red appear richer.

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How much is a red ruby worth?

High-quality rubies that weigh over 10 carats have been known to sell for even more than a diamond of the same size! What is this? Some rubies on the larger side have sold for upwards of $225,000 per carat. For comparison, diamonds average at a sales price of about $125,000 per carat.

What is pigeon blood ruby?

Pigeon’s blood is the term applied to the most highly saturated colour and natural red fluorescence possible in a ruby. Weighing an impressive 10.05 carats, the Ratnaraj is a wonder of the natural world.

What gemstones are red in color?

Best Red Gemstones Used in Jewellery

  • Ruby. Whenever we hear the term red gemstone, perhaps ruby is the only gem that comes to our mind usually. …
  • Red Garnet. Garnet gemstones come in all colours except blue. …
  • Red Diamond. …
  • Red Tourmaline / Rubellite. …
  • Red Zircon. …
  • Red Agate. …
  • Red Spinel. …
  • Red Topaz.

What birthstone is a ruby?

The most recognized birthstone for July is the ruby, a rich red gemstone that has been around since the dawn of time.