Glass and Crystal Stones in Jewellery: A Complete Guide

Glass is one of the oldest and most versatile materials in jewellery. It can be coloured in almost any shade, moulded into any shape and cut to sparkle. From kundan-style stones to rhinestones and faceted crystal, glass gives imitation jewellery much of its colour and glow. This guide explains the main types and how to care for them.

A long history

Glass has been used to imitate precious stones since ancient times. In the 18th century, high-quality "paste" glass was cut to sparkle like diamonds and worn by fashionable society, and fine examples are now in museum collections such as the Victoria and Albert Museum's. See The History and Evolution of Fashion Jewellery.

Types of glass and crystal stones

Moulded glass stones

Glass pressed into moulds, producing consistent shapes at low cost. Edges may be softer and less sharp than cut stones.

Cut (faceted) glass

Glass cut and polished with facets. Better-cut glass reflects more light and looks crisper.

Crystal

In jewellery, "crystal" usually means high-quality glass designed for brilliance. Some crystal contains lead oxide, which increases refraction and sparkle. Precision machine-cut crystal is widely used in fashion and stage jewellery.

Rhinestones

Rhinestones are glass or crystal stones, typically with a reflective foil or coating on the back. The name has historical links to rock crystal pebbles from the Rhine region; in some languages they are called "strass".

Foil-backed and kundan-style stones

Flat or lightly faceted glass with a reflective foil backing. The foil reflects light through the glass, producing a warm, steady glow. These are the stones used in kundan-style jewellery. See Kundan Jewellery.

Glass cabochons

Smooth, domed glass stones without facets, often used for coloured centre stones and vintage looks.

Specialty glass

• Opal-effect and moonstone-effect glass with milky, shifting colour
• Aurora borealis (AB) coatings, which add a rainbow sheen
• Dichroic glass, which shows different colours from different angles

Glass vs CZ

See Cubic Zirconia Explained.

How to judge glass stone quality

• Clarity: no bubbles or cloudiness (unless intentional).
• Even colour throughout the stone.
• Sharp facets on cut stones.
• Intact foil: no dark spots, peeling or patchy reflection on foil-backed stones.
• Secure setting: no rattling, gaps or excess glue.

The biggest risk: moisture

Foil backings and coatings are vulnerable to water. When moisture gets behind a stone, the foil can oxidise, causing:

• Dark spots or patches
• Loss of reflection (the stone looks dull or grey)
• Cloudiness

Once foil is damaged, it usually cannot be restored without replacing the stone.

Caring for glass and crystal stones

1. Never soak foil-backed or glued stones.
2. Wipe gently with a soft, dry cloth.
3. Keep away from perfume, hairspray and lotions, which can damage coatings.
4. Store separately to prevent scratches; glass is softer than many materials.
5. Avoid heat and steam.
6. Keep silica gel in storage boxes in humid climates.

See How to Clean Imitation Jewellery Safely.

Key takeaway

Glass and crystal stones bring colour and glow to imitation jewellery, from kundan-style sets to sparkling rhinestones. Look for clear, evenly coloured, securely set stones with intact foil, and keep them dry to preserve their beauty.

Sources and further reading

• GIA Gem Encyclopedia
• Victoria and Albert Museum — Jewellery collections

Written by

HANSINI369 Editorial Team

Our editors research jewellery types, materials, care and craft, and review guides when materials, standards or recommendations change. Read our editorial policy.