A loose diamond rarely falls out without warning. There are almost always small signs beforehand; they are just easy to miss if you are not paying attention.
A stone that wiggles, even slightly
Give your ring a gentle press or a light shake near your ear. If the stone moves at all, even a tiny amount, or you notice a faint clicking sound, that is a clear sign the setting has loosened and needs attention before it gets worse.
Bent or worn prongs

Prongs are the small metal claws holding your diamond in place, and they wear down gradually with everyday use. Look closely for any that appear thinner, flattened, or bent slightly out of position compared to the others. Uneven prongs are one of the most common causes of a stone eventually working loose.
Catching on fabric more than usual

If your ring has started snagging on jumpers, gloves, or scarves more frequently than it used to, it often means a prong has lifted slightly away from the stone, creating a small edge that wasn't there before.
The stone looks slightly off centre.

Compare your ring to old photos if you have them. A diamond that has shifted even fractionally within its setting, no longer sitting perfectly straight, is a sign the setting has moved and should be checked.
Reduced sparkle that will not clean off

If your diamond looks noticeably duller despite regular cleaning, it may mean the stone is no longer sitting flush against the setting, altering how light enters and reflects.
What to actually do about it
None of these signs means panic, but they do mean a proper check is worth booking sooner rather than later. A jeweller can tighten prongs, re-secure a setting, or replace worn areas well before a stone is ever actually at risk of falling out completely.
Diamonds are hard-wearing, but settings are not indestructible, and a five-minute check can save you from losing a stone entirely.
If it has been a while since your ring was properly checked, visit Azzallure. Our team can inspect your setting and catch any issues early, well before they become a real problem.