The Complete Guide to Birthstones (January to December)
Author: Winston Wu (Luxury Brand Buyer since 2012, Expert Diamond Buyer, IGI Professional), MadisonDia Editorial Team
Updated: April 21, 2026
Origins, Meanings, Price Ranking, Lab-Grown Alternatives & Certification Guide
Birthstones are gemstones associated with each month of the year, combining history, symbolism, and modern jewelry trends. Today, they serve as a practical framework for choosing meaningful jewelry—especially as buyers compare natural vs lab-grown gemstones and evaluate quality, durability, and certification.
What Are Birthstones and Where Do They Come From?
The concept of birthstones dates back thousands of years and is rooted in religious and cultural traditions.
Ancient Origins
The earliest reference comes from the Biblical Breastplate of Aaron, which featured 12 gemstones representing the 12 tribes of Israel. Over time, these stones became associated with zodiac signs and eventually calendar months.
Modern Standardization
The modern birthstone system was standardized in 1912 by the American National Retail Jewelers Association, forming the list widely used today.
This means birthstones are tradition-based rather than scientific classifications, and some months include multiple gemstones due to evolving availability and market demand.
Natural Birthstone Price Ranking (High → Low)
Tier 1 — Ultra Premium
- Diamond (April)
- Ruby (July)
- Sapphire (September)
- Emerald (May)
Tier 2 — High Value
- Alexandrite (June)
- Tanzanite (December)
- Tsavorite (premium green alternative)
Tier 3 — Mid-Range
- Aquamarine
- Topaz
- Tourmaline
- Garnet
Tier 4 — Affordable
- Amethyst
- Citrine
- Peridot
Tier 5 — Organic / Soft Stones
- Pearl
- Opal
- Turquoise
Pricing depends on rarity, clarity, durability, treatments, and demand, not just gemstone type.
January to December Birthstones (With Lab-Grown Options)
January — Garnet
Lab-grown: Not common
Note: Includes varieties like red garnet and green tsavorite
February — Amethyst
Lab-grown: Yes (widely available)
Note: Natural stones are already affordable
March — Aquamarine
Lab-grown: Rare
Note: Valued for light blue clarity
April — Diamond
Lab-grown: Yes (major category)
Note: Highly standardized grading system
May — Emerald
Lab-grown: Yes
Key trait: Jardin (internal inclusions)
Note: Often treated with oil to improve clarity
June — Pearl / Alexandrite / Moonstone
- Pearl → Cultured (human-assisted process)
- Alexandrite → Lab-grown available
- Moonstone → Limited lab production
July — Ruby
Lab-grown: Yes (very common)
Note: Heat treatment is standard in natural stones
August — Peridot
Lab-grown: Not common
Note: Naturally vibrant green gemstone
September — Sapphire
Lab-grown: Yes
Note: Available in many colors beyond blue
October — Opal / Tourmaline
- Opal → Synthetic exists
- Tourmaline → Rare lab-grown
November — Topaz / Citrine
Lab-grown: Limited demand
Note: Many blue topaz stones are treated
December — Tanzanite|Turquoise|Zircon
- Tanzanite → Not commercially lab-grown
- Turquoise → Stabilized (not true lab-grown)
- Zircon → Natural focus
How Are Gemstones Verified? (Diamond vs Colored Stones)
Gemstone verification differs significantly between diamonds and other colored gemstones.
Laser Inscription (Primarily Diamonds)
Diamonds often include a laser inscription linking the stone to a grading report from labs such as:
Most colored gemstones do not have laser inscriptions.
Gemological Identification Methods
Colored gemstones are verified using:
- Refractive index (RI)
- Inclusion patterns
- Spectroscopy
- Microscopic analysis
Examples:
- Emerald → Jardin inclusions
- Ruby → Silk inclusions
- Sapphire → Growth zoning
Gemstone Certification: When It Matters (Market Reality)
Unlike diamonds, most gemstones are not automatically certified. This is due to cost efficiency and market structure.
Why Most Gemstones Are Not Certified
- Certification costs can be high relative to stone value
- Many gemstones are small or mass-produced
- Retailers rely on supplier sourcing and internal quality control
This is standard industry practice, even among major retailers like Blue Nile.
When Certification Becomes Important
- High-value stones (large carat size)
- Origin-sensitive gems (e.g., Colombian emerald, Burmese ruby)
- Treatment disclosure (oil, heat, filling)
- Collector or investment-grade stones
Major Gemological Laboratories
- GIA (Gemological Institute of America)
- IGI (International Gemological Institute)
- GRS (GemResearch Swisslab)
- CGL (Central Gem Laboratory)
Key distinction:
- Natural gemstones → often certified by specialized labs like GRS or CGL for high-end stones
- Lab-grown gemstones → commonly certified by IGI or GIA
Instead of saying gemstones are “not worth certifying,” the more accurate view is:
Certification is selective and value-driven—it becomes essential for high-value or high-risk purchases.
FAQ — Birthstones & Gemstone Certification
Are birthstones scientifically defined?
No. Birthstones are based on historical and cultural traditions rather than scientific classification.
Do all gemstones come with certification?
No. Most commercial gemstones are not certified due to cost considerations. Certification is typically reserved for higher-value stones.
Do gemstones have laser inscriptions?
Generally no. Laser inscriptions are mainly used for diamonds, not colored gemstones.
How can I verify if a gemstone is natural or lab-grown?
The most reliable method is certification from a recognized gemological laboratory such as GIA, IGI, GRS, or CGL.
Are lab-grown gemstones real?
Yes. They have the same chemical and physical properties as natural gemstones but are created in controlled environments.
Conclusion
Birthstones combine tradition, personal meaning, and modern buying considerations. While their origins are historical, today’s buyers must also evaluate durability, pricing, lab-grown alternatives, and certification.
Understanding how gemstones are structured and verified—especially the difference between diamonds and colored stones—allows for smarter purchasing decisions and greater long-term value.
