Gemstones

Quartz - Chapter 1

          Our planet has various types of minerals, many of which can be turned into fine jewelry. A type of mineral is cherished for its beauty and its large variety of colors. It is widely known as Quartz. On Moh’s Scale, Quartz has a hardness of 7/10, therefore, is classified as a soft gemstone. With this level of hardness, Quartz is quite resistant to scratching, making it suitable for jewelry uses. Quartz is only a general term for various types of Quartz. In fact, Quartz goes by an array of different names based on its color:

Read more

Pearl - Chapter 1




               Pearl is regarded one of the most sought after jewelry. It can be created in various types of shelled mollusk, such as conch shell, mussel, abalone, and oyster. Yet, only pearl oyster and pearl mussel can create jewelry-grade pearl.

               Pearl is formed inside the shell of mollusk. Its formation process is similar to how our eyes produce tears to wash out irritants when our eyes come into contact with them. When irritants, such as grain of sand or rocks, enter the shell, the mollusk, being irritated, will secrete nacre to coat the irritants.

Generally, pearl can be classified into two types:

  • Saltwater pearl
  • Freshwater pearl
Read more

Jadeite Jade

           
            When we talk about the hardest gemstone, diamond is the king. But when it comes to the toughest gemstone, Jade prevails over other gems. In gemology, toughness indicates the gemstone’s ability to absorb changes in its form without breaking. The gemstone’s toughness highly correlates with its strength and flexibility, in other words, the tougher it is, the more flexible it becomes. Given with high flexibility, these gemstones can be twisted around and formed into different shapes without the risk of breaking. As such, jade is widely used as a primary material in various carved pieces

 

            Jade, which is widely known as “Stone of Heaven”, can be classified into 2 types: Jadeite and Nephrite. These two types of jade have similar looks, but they are classified as two different types because the gemologists found that they have different chemical components. In this article, I will primarily focus on Jadeite. 

 

Read more

Corundum

Rough Ruby

          Besides from diamond, another type of gemstones that is just as equally famous is Corundum. According to Moh's Scale, corundum has a hardness of 9 and a specific gravity ranges from 3.95 to 4.10. Corundum is known for its 2 famous gemstones, namely Ruby and Sapphire.


          Color is the main criteria used to distinguish between ruby and sapphire. The colors of ruby include purple, purplish-red, orange-red, and bright red, where bright red ruby commands huge premium and popularity over other types of ruby. For sapphire, there are more varieties in terms of color, and usually derives its name from its color, namely Blue Sapphire, Orange Sapphire, Green Sapphire, Pink Sapphire, Yellow Sapphire, Colorless Sapphire, and Padparadscha (pink-orange).

 

          I believe many of you have heard of unheated and heated gems. The meanings of the two terms are pretty literal, unheated gems are those gems that have not gone through any heating process, whereas heated gems are those gems that have gone through heating process to improve their qualities. So, why do we have to heat those gems? There are various answers to the question, but the two main reasons are as follow:

 

Read more

Diamond - Chapter 1

               When we talk about jewelry, usually the first thing that pops up in your mind is diamond. For my friends, who are not in the industry, they often give me perplexed looks when I mention other types of jewelry that are out there. On the contrary, when I talk about diamond, they all know what it is. Everybody knows that diamond is expensive and has high market value. But only a handful of people knows where does diamond come from, what are its properties, and why is it so expensive?

Read more