There is no definitive answer to what is the best gem for jewellery, as different gems have different properties, colours, and values. However, some factors that can help you choose the best gem for your jewellery or coloured gemstone engagement ring are:
Durability: Gems that are hard and resistant to scratches, chips, and cracks are more suitable for jewellery that will be worn frequently or exposed to rough conditions. The Mohs scale of mineral hardness is a common way to measure the durability of gems, with 10 being the hardest and 1 being the softest. For example, diamonds are the hardest gems with a Mohs rating of 10, while pearls are among the softest with a rating of 2.5 to 4.5.
Colour: Gems come in a variety of colours, from colourless to black and everything in between. The color of a gem can affect its value, rarity, and appeal. Some gems are prized for their intense and vivid colours, such as rubies, emeralds, and sapphires, while others are valued for their subtle and delicate hues, such as aquamarine, morganite, and moonstone. The color of a gem can also complement or contrast with your skin tone, hair color, and clothing style.
Price: Gems vary widely in their prices, depending on their quality, size, origin, and demand. Some gems are very affordable, such as amethyst, citrine, and garnet, while others are very expensive, such as alexandrite, red beryl, and pink diamond. The price of a gem can also change over time, depending on the market trends, supply and demand, and fashion preferences.
Meaning: Gems can have symbolic meanings, such as birthstones, anniversary stones, or zodiac stones. Some gems are also associated with certain attributes, such as love, luck, health, or protection. For example, amethyst is the birthstone for February and is believed to promote calmness and clarity. Emerald is the anniversary stone for the 20th and 35th years of marriage and is said to represent loyalty and faithfulness. Turquoise is the zodiac stone for Sagittarius and is thought to bring happiness and good fortune.
Ultimately, the best gem for your jewellery is the one that you love and enjoy wearing.