Collectors highly prize pink sapphires, also referred to as fancy sapphires, for their rarity. These valuable gems vary in colour, from light to very dark, or hot, pink, and are renowned for their durability and scratch resistance. These coloured sapphires are often set in pink sapphire necklaces, rings, earrings, bracelets, pendants, and brooches.
Well-cut pink sapphires are appreciated for their light refraction, which serves to create a brilliance and sparkle, perfect for accent pieces like pink sapphire rings. When shopping, it is imperative to find a good balance between depth and colour; avoid ones with deep or shallow cuts. A deep cut causes it to lose a lot of its colour, while a shallow cut washes out this gem's deep hue. It should also be symmetrical and even; examine the crown and the table to ensure this quality.
The number of inclusions the pink sapphire has determines its clarity. Common inclusions include crystals, needles, silk fibres, cracks cavities, chips, and colour zoning, or uneven colour distribution. Still, surface blemishes, such as scratches, nicks, and abrasions, can also reduce the clarity of the gem. Generally speaking, gems with fewer inclusions and blemishes are considered higher quality, and therefore, of greater value. Pink sapphires, similar to other gemstones, are graded on common scale. Flawless sapphires are most desirable, while declasse sapphires are of very poor quality. Pink sapphires are often heat treated to remove impurities. When shopping, avoid gems that have received "temporary" heat treatments, as these sapphires are considered of lower quality and tend to lose their lustre over time.
Carats are a unit of measurement that refers to the pink sapphire's mass. Still, some jewellers prefer to list sapphires by their weight rather than carat. Generally speaking, the higher the number of carats or the larger the gem size, the more valuable it is.
Due to their rarity and cost, pink sapphires are often shaped into ovals or cushions—perfect for pink sapphire pendants—in an effort to preserve as much of the original stone as possible. Round sapphires are also popular; however, these gems tend to be more expensive, as their final shape requires the removal of a lot of rough sides. Still, emerald, en cabochon, heart-shaped, marquise, princess, radiant, and trilliant gemstone jewellery cuts prove common.
Sapphires are often treated to improve their colour or clarity. While heat treatments do not affect the integrity of the gem, others, such as diffusion treating, lessen its quality, should the stone ever be reshaped or reset. Unless otherwise stated, it is safe to assume that the pink sapphire has undergone heat treatment.