Laboratory Tanzanite

La laboratory tanzaniteTanzanite, sometimes called synthetic tanzanite, is a gemstone created artificially in a laboratory that mimics the physical and chemical properties of natural tanzanite. Tanzanite, a variety of zoisite, is known for its fascinating blue to violet hues. First discovered in 1967 in Tanzania, this gem quickly became one of the most sought-after in the world of luxury jewellery. Laboratory-grown tanzanite offers an ethical and often more affordable alternative, while retaining the aesthetic qualities of its natural counterpart.

The characteristics of laboratory tanzanite

La laboratory tanzanite is produced using sophisticated techniques that recreate the natural conditions in which tanzanite is formed. Here are some of the main characteristics:

• Chemical composition and crystal structure : Laboratory tanzanite has a similar chemical composition and crystal structure to natural tanzanite. This means that it retains the same optical properties, in particular its pleochroism, which makes it appear different colours depending on the angle at which it is viewed.
• Colour : Laboratory-grown tanzanite is prized for its deep, rich hues ranging from blue to violet. Designers can adjust growing conditions to obtain specific colours, ensuring remarkable uniformity and intensity.
• Purity : Laboratory tanzanites tend to have fewer inclusions than their natural counterparts, making them clearer and often brighter.
• Durability : Laboratory tanzanite, like natural tanzanite, has a hardness of 6 to 7 on the Mohs scale. This means that it is relatively durable but still requires care to avoid scratches and damage.
• Ethics and sustainability : Laboratory production of tanzanite reduces the environmental impact and avoids the ethical problems associated with mining. It offers a responsible alternative for consumers concerned about the origin of their jewellery.

How is laboratory tanzanite made?

The creation of the laboratory tanzanite involves advanced technological processes. The two main methods used are :

• The hydrothermal method : This technique simulates the high-pressure, high-temperature conditions found in the Earth's crust. The ingredients needed to form tanzanite are dissolved in an aqueous solution and heated under pressure to initiate crystallisation.
• The fusion method : In this method, the base materials are melted at high temperature and slowly cooled to form tanzanite crystals. This technique also makes it possible to control the colour and purity of the final stone.

These methods enable laboratory tanzanites to be produced with great precision, ensuring consistent quality and continuous availability.

Use of laboratory tanzanite in luxury jewellery

La laboratory tanzanite is becoming increasingly popular in luxury jewellery because of its many qualities. Here are a few common uses:

• Rings : Rings set with laboratory-grade tanzanite are highly prized for their sparkle and unique colour. They are often used as engagement or cocktail rings.
• Necklaces and pendants : Laboratory tanzanite is perfect for pendants, adding a touch of elegance and sophistication to any necklace.
• Earrings : Earrings adorned with laboratory tanzanite offer exceptional brilliance and colour, ideal for special occasions.
• Bracelets : Bracelets inlaid with laboratory tanzanite are also very popular, adding a touch of luxury and refinement.

Frequently asked questions about laboratory tanzanite

• Is laboratory tanzanite as valuable as natural tanzanite?
  Laboratory tanzanite is generally cheaper than natural tanzanite because of its controlled production and higher availability. However, it retains high value because of its similar properties and reduced environmental impact.
• How do I care for laboratory tanzanite?
  Like natural tanzanite, laboratory tanzanite must be handled with care to avoid scratches and damage. We recommend avoiding harsh chemicals and cleaning the stone with warm soapy water and a soft brush.
• Does laboratory tanzanite change colour over time?
  No, laboratory tanzanite, like natural tanzanite, retains its colour over time if properly cared for.
• Is it easy to distinguish laboratory tanzanite from natural tanzanite?
  It can be difficult to distinguish laboratory tanzanite from natural tanzanite with the naked eye. Only in-depth gemmological tests can reveal the differences.