Crystal and agate are common semiprecious stones used in fashion jewelry. Both are hard, colorful, and well suited to pendants, earrings, and bracelets. Crystal is clear and brilliant, while agate shows warm layered banding. Some stones on the market are treated or dyed, so buyers should separate natural, treated, and synthetic categories before ordering.

Main Stone Characteristics

• Clear quartz: A single crystal of silica with glass-like luster and a Mohs hardness of 7. Tiny internal inclusions or cotton-like veils are normal natural features, and the stone is often cut into faceted pendants. Completely flawless clear quartz commands a higher price.
• Rose quartz: Soft pink caused by trace titanium and iron, popular for feminine pendants and beaded strands. Unusually deep or vivid pink rose quartz is often heat-treated or dyed.
• Agate: A microcrystalline quartz with typical banded patterns. Red, black, and green agate are common; most green agate is dyed, since natural green agate is rare. Blue and purple agate are also usually dyed.
• Amethyst: Purple from iron content; deeper colors command higher value, and long sun exposure can fade the color, so it should be kept away from direct sunlight.

Choosing and Caring

When buying, check whether the color looks even and natural, whether the banding flows smoothly, and whether the surface polish is smooth with no visible cracks. Natural stones may contain slight veils and ice lines. A supposedly natural stone with zero imperfections at a low price is likely glass or plastic. Under magnification, natural stones show irregular gas-liquid inclusions, while glass imitations show round bubbles or swirl patterns.

Although crystal and agate rate high on the Mohs scale, they are brittle. Avoid knocks and sudden temperature changes, which can chip the edges. Store each piece separately in a soft cloth, keep away from perfume and hairspray, and wipe gently with a soft cloth and water. Avoid ultrasonic cleaning, which can loosen stones. Reputable suppliers disclose any dyeing or heat treatment on the packing list, so ask about treatment status before ordering.

MASCOT Jewelry pairs natural crystal and agate with 925 sterling silver, and all incoming stones are inspected before production, for OEM and ODM pieces shipped to over 50 countries. Contact us for a sample catalog on semiprecious stone jewelry.