Our Materials
Pearls, Gemstones, Silver & Gold
Pearls and gemstones are the heart. Carefully selected metal settings hold, frame, and complete each design.
Natural materials at the center
The heart of every COSEA piece
Every exact product material and finish must follow its Product Details section.
Freshwater Cultured Pearls
Real cultured pearls formed with human assistance. Natural variation may appear in shape, color, size, luster, texture, and surface marks.
Natural Gemstones
Stones selected for color, texture, and character. Natural inclusions, surface characteristics, and color variation may occur.
Metal settings and finishes
Gold color is not automatically solid gold. Silver color is not automatically sterling silver. Product Details remain the source of truth.
Clear material language
Know what each term means
Descriptions must match the actual piece, component, base metal, and finish.
Sterling Silver
Used in selected designs and may naturally tarnish over time.
18K Gold
Use only when a product or component is confirmed as 18K gold.
Gold Plated or Vermeil
Different from solid gold; base metal and finish must be stated.
Gold Tone or Silver Tone
Describes color or appearance, not precious-metal content.
Natural variation is part of the material
No two pearls or gemstones are exactly alike. Slight differences in color, shape, luster, texture, inclusions, and surface characteristics are expected and are not considered defects.
Material accuracy comes first
Natural variation does not excuse breakage, missing parts, incorrect items, or severe mismatch. Contact customer care if an item arrives damaged, defective, or incorrect.