Heat treatment may be performed to improve the color of the ruby, although it may also be done to remove unwanted material or improve a stone’s clarity.

There are two types of heat treatments, which are commonly used to improve the color and clarity of a ruby. The first is called “fusion”, and it involves heating the stone to over 1,500 degrees Celsius (2,700 Fahrenheit) in order to melt impurities out of its structure. This process leaves behind clear crystals that make up most rubies–but it also causes them to lose their unique character by turning them into generic red gems with no distinguishing features.

The second type of treatment is called “annealing”. This involves taking an already-formed ruby and heating it up until its internal stresses have been relaxed enough for it not to crack under pressure during cutting or polishing; if this doesn’t happen before cutting begins then there’s no way for anyone else but yourself know what kind of stone you’re working with!

After heating and cooling, some rubies will have a faint pinkish colour. These rubies are referred to as “fancy” or “enhanced” rubies.

The heating process is often used to enhance the colour of rubies. It can be done in a variety of ways, but generally involves heating the stone in an oven or flame to get the desired result. After heating and cooling, some rubies will have a faint pinkish colour. These rubies are referred to as “fancy” or “enhanced” rubies.

Some people prefer unheated rubies for their natural beauty, but heated rubies are more highly valued for jewellery use.

The most important difference between heated and unheated rubies is that the latter have not been processed in any way. This means that they are more likely to have flaws, but also that they display their natural beauty more prominently. Unheated rubies are often preferred by collectors because of this fact; although many people choose to wear their gemstones as jewellery, others prefer to keep them as collector’s items or display them in museums for educational purposes.

Heated rubies on the other hand have been treated with heat in order to alter their appearance – usually by giving them a brighter colour and making them more translucent than natural gems would be without treatment (although some types of heating can make stones less transparent). This process makes it easier for manufacturers to produce large quantities of high quality gems at low costs which makes them much more widely available than untreated stones; however it also reduces their value relative.

How can you tell heat-treated from unheated Ruby?

The easiest way to tell is by looking at the color of your stone.

Unheated rubies will have a rich red hue, while heat-treated stones tend to be more yellow or orange in color. If you want your ruby to stay as red as possible, choose an unheated stone!

In India Ruby Stone is called as Manik Ratna.

The Manik Ratna is the most precious of all rubies, and they are known as the “King of Gems.” They are traditionally used in India for making jewelry. The color of these stones ranges from a rich red to orange with hints of yellow or brown.

The best way to tell if you have a Manik Ratna is by its size; they’re typically larger than other types of rubies. If you find yourself holding an uncut stone that looks like it could be one, try putting it next to another ruby in your collection that’s been cut into a cabochon (the cut gemstone). If there’s no difference between them visually and physically then you’ve got yourself a real treasure!

Human beings have been using precious stones for thousands of years.

Ruby is one of the most precious and expensive stones in the world. It is also one of the hardest minerals on Earth, which makes it ideal for use as a semi-precious stone.

This red-colored stone has been used in jewelry and other decorative items for thousands of years. In fact, historians believe that ruby was first discovered by humans around 5300 BC during an expedition in Burma (now called Myanmar).

Jasper, Pyrite, and Ruby are some of the most popular gemstones used.

Jasper, Pyrite and Ruby stones are three of the most popular gemstones used in jewelry. Each has its own unique properties that make it suitable for different applications.

Jasper is an opaque stone with a mottled appearance. It can be found in many colors including black, red, brown and yellow-brown. Jasper is usually cut into cabochons or spheres because they have no cleavage planes so they will not break easily when shaped into flat pieces like other gemstones such as quartz do (which requires special techniques). This makes them ideal for making beads or pendants since they won’t chip easily if dropped onto hard surfaces such as concrete floors!

Ruby is one of the oldest known gemstones in history.

Ruby is one of the oldest known gemstones in history. It has been used for thousands of years to adorn people’s jewelry and is still considered one of the most popular precious stones today. Ruby’s popularity comes from its rich red color, which can be found in many different shades ranging from light pink to deep crimson.

In addition to its vibrant red hue, ruby also features an iridescent shine called “schiller” that can only be seen when viewed from different angles or under different lighting conditions (such as daylight vs artificial light). This unique trait makes it possible for these gems to change color depending on how you look at them!

Conclusion

One of the main differences between heated and unheated ruby stones is their color. Heated ruby stones are usually dark red in color, whereas unheated ones are lighter.