Most box clasps release by pressing or sliding a small tab or button on the outer housing that disengages the tongue lock. It's the deliberate resistance of that mechanism that's designed to prevent accidental opening during wear.
Stone Story
Amethyst jewelry spans a broad color range, and the grade makes a visible difference. Pale lavender through mid-violet are the accessible tiers, and the most prized stones show a deep, even purple with rose and red secondary hues. The trade calls that top color grade Siberian amethyst, which is a designation based on quality, not origin.
The Perfect Gift
Some birthstone designations have been contested, revised, or complicated by alternatives. February's hasn't. Amethyst has held the month's singular designation since 1912 without revision.