Compass prongs are considered secure due to their strategic placement and thoughtful design. Positioned at the cardinal points (north, south, east, and west) of the gemstone, the prongs provide an even grip that helps distribute pressure uniformly, reducing the risk of the stone becoming loose. Expert craftsmanship is also critical, as skilled jewelers angle the prongs inward to "hug" the stone tightly, leaving no gaps or weak points. Proper care and maintenance, combined with quality design, make compass prongs a reliable and stylish choice for securing gemstones.