Technical Information on Gemstones

Gem Rock Auctions has one of the largest range of Certified Gemstones online. Browse this list of approved gemstone testing laboratories.

In the world of gemstones there are special types of stones that show the Schiller effect or Aventurescence. Lets explore what these gems are and how they behave

Azotic treatment of Topaz and Quartz is a treatment that creates a layer of color over a gemstone. Learn more about this treatment and check out our stones fro sale.

The color of a Sapphire is cuased by different impurities inside the gemstone. Titanium for example creates the beautiful deep blue that we love so much in Sapphires

In the world of Garnet there is a multitude of colors to suit everyone's taste. Check out what colors Garnets are available in and how they are all related.

Color changing gemstones are gemstones which change color in different lighting conditions. Learn more about these stones and browse our gemstones for sale.

Emerald Inclusions are fascinating. inside each Emerald the tiny inclusions tell a story about where the gem came from and how it formed.

There are so many tools on the market for testing a gemstone, but what are the main tools required for simple analysis. Lets look at four tools for gemstone testing.

Compliance issues in the Gemstone Industry are affecting countries worldwide. Sellers will face audit requests to prove the legitimacy of their business.

Gota De Aceite Emeralds have a special feature which increases their value. Read more about this rare type of Emerald and learn how it adds to the value.

How do gemstones form in the earths crust? It is far more complicated than first thought but we have broken it down to make it easier to understand

Have you ever wondered how they treat Ruby gemstones? There are so many different types of treatments on the market and we will help to explain them

Alexandrite is one of the rarest gemstones on the planet. It has the ability to change colors under different light. Lets explore how it does that

The MOHS scale of hardness is universally used when describing gemstones. But what does it mean and how can you use it help protect your gems and jewelry

There are many treatments for Pearls that change their apperance. Most of these treatments are acceptable. Learn more about this gemstone and browse the beautifully cut stones we have for sale.

Ever heard of phenomenal gemstones? These gemstones display amazing optical effects under different lighting, such as cats eyes and stars. Read more about these amazing gems..

Each gemstone has it's own unique set of physical properties that can be used to identify it. These include hardness, growth patterns and cleavage. Learn more about the physical properties of gemstones.

Sapphire Treatments refers to the process of improving the clarity, colour and value of Sapphires that have been mined out of the ground.

The Four C's are a standard definition on how to describe and judge the quality of a Diamond. let us explain it in more detail.

Quartz Crystal is one of the most common Minerals on Earth. It is one of the most loved gems and for centuries has been used for jewelery and carvings. Quartz Crystal is one of the most common Minerals on Earth. It is one of the most loved gems and for ce

What are Synthetic Gemstones, Imitation and Simulants? We will explain the difference and how some of them are created.

Sunstone occurs in a range of colors that begins with colorless and ranges through to yellow, orange and red. The color is determined by the abundance and size of the copper platelets within the stone.

Carat and Karat are two terms you will here in the Jewelry business that sound exactly the same. They have very different meanings though.

Aquamarine is made of a Beryllium, Aluminium Silicate and is part of the Beryl family of minerals. Beryl can be many colors but when it’s blue or blue-green it is called aquamarine.