As winter settles in, the December birthstones, turquoise and zircon, bring cool shades of sparkle to the season. Their beautiful blues and greens evoke frosted landscapes and the shimmer of festive lights, making them the perfect gems to wear in the festive season.

From turquoise-studded forget-me-nots to beautifully enamelled pansies, floral motifs have long been a central theme in jewellery design....