Laboratory sapphire

In the world of luxury jewellerythe laboratory sapphire is gaining in popularity thanks to its exceptional characteristics and increased accessibility. But what exactly is a laboratory sapphire? How is it made, and how does it differ from natural sapphires? Let's delve into the fascinating world of laboratory sapphires to understand why they are increasingly popular with lovers of high-quality jewellery.

What is a laboratory sapphire?

A laboratory sapphire is a laboratory-created precious stone with the same chemical, physical and optical properties as natural sapphires. Sapphires, whether natural or laboratory-produced, are composed of corundum, a crystallised aluminium oxide. The emblematic blue colour of sapphires comes from traces of titanium and iron present in the crystal.

Manufacturing process for laboratory sapphires

The laboratory sapphires are manufactured using sophisticated crystal growth methods. The two most common methods are the Verneuil method and the hydrothermal method.

• Verneuil method : Invented in 1902 by French chemist Auguste Verneuil, this method, also known as the flame meltingThe process involves melting aluminium oxide powder using a hydrogen-oxygen flame. The molten powder then crystallises into a synthetic sapphire as it cools.
• Hydrothermal method : This more complex and costly method mimics the natural conditions under which crystals form. It requires high temperatures and pressures to dissolve the mineral nutrients in an aqueous solution, allowing the crystals to grow slowly and in a controlled manner.

Advantages of laboratory sapphires

The laboratory sapphires have a number of advantages over natural sapphires:

• Quality and purity : Laboratory sapphires are often of better quality in terms of clarity and colour, because their growth is controlled and optimised.
• Durability : With the same properties as natural sapphires, laboratory sapphires have a hardness of 9 on the Mohs scale, making them highly resistant to scratches and wear.
• Cost : Laboratory production reduces costs, making these gems more affordable for consumers.
• Ethics : Laboratory sapphires are an ethical alternative, as their manufacture does not contribute to the environmental and social problems associated with mining.

Differences between laboratory sapphires and natural sapphires

Although visually similar, there are a few distinctions between the laboratory sapphires and natural sapphires:

• Origin : Natural sapphires are formed over millions of years in the earth's crust, while laboratory-grown sapphires are created in a matter of weeks or months.
• Inclusions : Natural sapphires often contain inclusions or microscopic imperfections, while laboratory sapphires are generally purer.
• Price : Natural sapphires are generally more expensive because of their rarity and the cost of extraction, unlike laboratory-grown sapphires, which are more affordable.

Frequently asked questions about laboratory sapphires

Are laboratory sapphires as precious as natural sapphires?

Although laboratory sapphires have the same physical and chemical properties as natural sapphires, their value may be lower due to their synthetic origin. However, their quality and appearance can often surpass that of natural sapphires.

How do you recognise a laboratory sapphire?

It is often difficult for a non-expert to distinguish between a laboratory sapphire of a natural sapphire to the naked eye. Gemologists use advanced techniques, such as microscopic examination, to identify specific growth characteristics in the laboratory.

Are laboratory sapphires durable?

Yes, the laboratory sapphires are as durable as natural sapphires. They have the same hardness of 9 on the Mohs scale, making them highly resistant to scratches.

Why choose a laboratory sapphire?

Choose a laboratory sapphire can be motivated by several reasons: better quality for a lower price, an ethical and environmentally-friendly option, and the increased availability of high-quality gemstones.

In conclusion, the laboratory sapphire represents a significant advance in luxury jewellery, offering a brilliant and ethical alternative to natural gems. Whether you're a keen collector or looking for the perfect piece of jewellery, laboratory sapphires from SMV Thailand promise to meet your expectations in terms of beauty, quality and social responsibility.