Nose Pin
A small stud worn in a nostril piercing, as distinct from the hooped nath.
Nose pins fasten in three ways: a screw-shaped post that twists in, a straight post with a push back, or a bent L-shaped pin.
The screw type is the traditional Indian fitting and by far the most secure for daily wear.
A single pearl or a small cluster is a common choice, since the piece sits close to the face where scale matters.
When you are buying
Gauge matters more than design. Nose piercings are made at a specific thickness, and forcing a thicker post through irritates the channel.
Nose ornaments
A few from the collection, from ₹700.

The Lantern Pearl Ring

The Blush Ring

The Duet Pearl Ring

The Moonrise Ring

Lustrous Gold Finish Pendant Accentuated With 7mm Oval White Pearl

Twirled Knot Pendant Accentuated With 7mm Oval White Pearl & CZ

Rich Red Faux-leather & White Pearl Bracelet

Bright Sky-Blue Faux-leather & Peach Pearl Bracelet
Nath
A nose ring. Sizes run from a tiny stud to a large hoop supported by a chain to the hair.
Stud
An earring that sits directly on the lobe, held by a post through the piercing.
Hypoallergenic
Metal unlikely to cause a skin reaction. In practice it means nickel-free, since nickel causes most jewellery allergies.
Screw Back
An earring post with a threaded end and a nut that screws on. The most secure earring fastening.