I purchased a pearl necklace with drilled pearls—does drilling affect the long-term preservation of the pearls?

No, drilling pearls for a necklace will not affect their long-term preservation, as long as the drilling process is done professionally and carefully. When done correctly, drilling is a standard part of making pearl jewelry and does not damage the pearl or affect its durability. Here’s why:

1. Professional Drilling Technique:
   Jewelers use specialized tools like ceramic or diamond drill bits to ensure that the drilling process is precise and does not harm the pearl's surface.

2. Cooling and Lubrication:
   During the drilling process, jewelers often use cooling or lubricating solutions to prevent the pearl from overheating, which can prevent any damage to the structure of the pearl.

3. Optimal Drilling Location:
   The drilling is done at the most suitable point on the pearl, typically at the center or symmetrically, ensuring no stress is placed on the pearl's delicate surface.

4. Post-Drilling Polishing:
   After the hole is drilled, the pearl is polished to remove any rough edges or burrs, ensuring a smooth finish that won’t cause irritation when worn.

When done with care, drilled pearls can last just as long as non-drilled pearls, maintaining their luster, beauty, and structure for many years to come. So, you can confidently wear your drilled pearl necklace without worrying about its long-term preservation.