AltGems
Updated as of June 2026

Rare and Collectible Gemstones

Hard to find and prized by collectors. These stones command attention for their scarcity.

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  1. Paraiba Tourmaline · Mohs 7.25 · $1,000 to $20,000/ct. A copper-bearing tourmaline famous for its electric neon blue-green glow, among the most prized colored gems.
  2. Alexandrite · Mohs 8.5 · $500 to $10,000/ct. Famous for changing color from green in daylight to red under incandescent light, it is linked to balance…
  3. Padparadscha Sapphire · Mohs 9 · $500 to $8,000/ct. A rare pink-orange sapphire named for the lotus blossom, prized for its delicate blend of warmth and softness.
  4. Demantoid Garnet · Mohs 6.75 · $200 to $3,000/ct. A rare brilliant green garnet prized for its high dispersion and fire, linked to vitality and prosperity.
  5. Tsavorite Garnet · Mohs 7 · $100 to $2,000/ct. A bright green garnet from East Africa associated with vitality, abundance, and renewal.
  6. Tanzanite · Mohs 6.5 · $100 to $1,200/ct. A rare gem found only near Mount Kilimanjaro, associated with transformation and insight.
  7. Spessartite Garnet · Mohs 7 · $50 to $800/ct. A vivid orange garnet associated with creativity, confidence, and joyful energy.
  8. Sphene · Mohs 5.25 · $20 to $300/ct. A brilliant fiery gem with dispersion greater than diamond, associated in tradition with mental clarity and…
  9. Kunzite · Mohs 6.75 · $20 to $250/ct. A pink to lilac stone tied to emotional healing, calm, and unconditional love in crystal tradition.
  10. Larimar · Mohs 5 · $10 to $150/ct. A rare sky-blue pectolite found only in the Dominican Republic, tied to calm, serenity, and communication.
  11. Chrome Diopside · Mohs 5.75 · $10 to $150/ct. A rich green silicate colored by chromium, valued as an affordable emerald alternative and tied to renewal.

Frequently asked questions

Rare and Collectible Gemstones?
Hard to find and prized by collectors. These stones command attention for their scarcity. Our top pick is Paraiba Tourmaline.
How did you rank these?
We rank by the factor that matters most for this list, then by overall value. Prices are general per-carat guides and vary by quality and seller.