Birthstones: A Complete Professional Guide

Birthstones are one of the most commercially significant gem categories in retail jewelry—accounting for a substantial portion of all jewelry gift purchases. Yet the history behind birthstones is richer than most customers—or retailers—realize. Understanding the origins, multiple options, and quality considerations for each month’s stones enables more knowledgeable, more confident sales conversations.

The Origin of Birthstones

The concept of birthstones traces to the Breastplate of Aaron described in the Book of Exodus—a ceremonial garment set with twelve gems representing the twelve tribes of Israel. These were later linked to the twelve months and the twelve signs of the zodiac. The modern birthstone list used in Western markets was standardized by the American National Retail Jewelers Association in 1912, with updates in 1952 and 2002.

The Modern Birthstone Calendar

January — Garnet: Typically red pyrope or almandite; also includes rare orange spessartite, green tsavorite, and color-change varieties

February — Amethyst: Purple quartz; widely available at all price points; heat-treated varieties include citrine

March — Aquamarine (primary), Bloodstone (alternate): Aquamarine is blue beryl; heat treatment common to improve color

April — Diamond: The most commercially valuable birthstone assignment; also white topaz and white sapphire as alternatives

May — Emerald: Green beryl; inclusions expected; almost all treated with oil or resin; Colombian finest

June — Pearl (primary), Alexandrite (secondary), Moonstone (alternate): Three very different gems; alexandrite the rarest and most valuable

July — Ruby: Red corundum; heat treatment nearly universal; Burmese origin commands premiums

August — Peridot (primary), Spinel (added 2016), Sardonyx (traditional): Peridot is olive-green olivine; spinel available in many colors

September — Sapphire: Blue corundum standard; all colors except red qualify as sapphire

October — Opal (primary), Tourmaline (alternate): Opal unique play-of-color; tourmaline available in virtually every color

November — Topaz (primary), Citrine (alternate): Blue topaz most popular; imperial topaz (orange-yellow) most valuable; citrine a budget option

December — Tanzanite, Turquoise, Blue Zircon: Three distinct blue options; tanzanite the most commercially prominent

Birthstone Sales Strategies

Birthstone jewelry sells most strongly as gifts—birthday presents, anniversary pieces, push presents, Mother’s Day gifts with multiple children’s stones, and memorial jewelry. The conversation around birthstones should always include the gem’s qualities (not just ‘it’s your birthstone’) and relevant care information. Offering customers alternatives within a month’s options allows upselling to finer or more unusual gems.

Presentation Tips

Know the quality range: Show the price range from entry-level to premium within each birthstone category

Tell the gem’s story: Each birthstone has history, lore, and significance worth sharing

Multiple-stone pieces: Mother’s rings and pendants featuring children’s birthstones are consistently strong sellers

Alternative stones: For customers wanting something unique, suggest the alternate birthstones or historical options

Care instructions: Always pair the sale with relevant care guidance—especially for softer stones like opal and pearl

Historical and International Variations

Different cultures maintain different birthstone lists. The Hindu calendar has its own gem-month assignments. British, German, and Italian traditions vary from the American 1912 list. Zodiac stones (based on astrological signs rather than calendar months) are a separate but related tradition. Understanding these alternatives allows you to serve internationally diverse clientele and offer unique options to customers familiar with the standard list.