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Tejas Beads is your trusted source for natural gemstone beads, pearls, and jewelry-making supplies. Expect great customer service, top quality stones, and prompt shipping from our USA based shop.

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12mm Gemstone Beads

12mm gemstone beads are a popular choice for large bead jewelry designs. Generally these beads are used by those with large wrists or in necklaces that are intended to make a statement. If you're trying to visualize this size, most dice are about 12mm wide. The great thing about these larger beads is that they show the beauty of the raw stone material and give your designs good weight when strung together. These are often combined with 8mm and 10mm beads to make stacked bracelets.

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  • Beads - Full Catalog
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  • Polished Seraphinite Beads For Jewelry Making. Natural Smooth Round Seraphinite Beads.

    Russian Seraphinite AAA · Smooth · Round · 10mm, 11mm, 12mm

    $156.95

    Russian Seraphinite AAA · Smooth · Round · 10mm, 11mm, 12mm

    $156.95

  • Smooth round ice obsidian beads with an icy, smoky look

    Ice Obsidian · Smooth · Round · 4mm, 6mm, 8mm, 10mm, 12mm

    $4.95

    Ice Obsidian · Smooth · Round · 4mm, 6mm, 8mm, 10mm, 12mm

    $4.95

  • Carved white mother of pearl daisy flower beads, shell treated to a uniform creamy white

    Mother of Pearl (alt) · Carved · Daisy Flower · 12mm

    $12.95

    Mother of Pearl (alt) · Carved · Daisy Flower · 12mm

    $12.95

  • Green garnet beads.

    Green Garnet · Smooth · Sticks · Graduated 10mm to 12mm

    $9.95

    Green Garnet · Smooth · Sticks · Graduated 10mm to 12mm

    $9.95

  • A close-up pile of small, round, off-white ceramic beads or balls filling the frame.

    Fossil Jasper · Matte · Round · 4mm, 6mm, 8mm, 10mm, 12mm

    $3.95

    Fossil Jasper · Matte · Round · 4mm, 6mm, 8mm, 10mm, 12mm

    $3.95

  • Polished marquise oval natural stone beads in warm earth tones on a dark background.

    Petrified Wood · Smooth · Marquise Oval · 10mm, 12mm

    $14.95

    Petrified Wood · Smooth · Marquise Oval · 10mm, 12mm

    $14.95

  • Close-up of multicolored beads with purple, orange, and white hues.

    Super 7 (Amethyst Cacoxenite) · Smooth · Round · 4mm, 6mm, 8mm, 10mm, 12mm

    $11.95

    Super 7 (Amethyst Cacoxenite) · Smooth · Round · 4mm, 6mm, 8mm, 10mm, 12mm

    $11.95

  • Black labradorite beads.

    Larvikite (Black Labradorite) · Matte · Round · 4mm, 6mm, 8mm, 10mm, 12mm

    $4.25

    Larvikite (Black Labradorite) · Matte · Round · 4mm, 6mm, 8mm, 10mm, 12mm

    $4.25

  • Smooth chip stick watermelon tourmaline beads in green and pink

    Watermelon Tourmaline · Smooth · Chips Sticks · 8mm to 12mm

    $9.95

    Watermelon Tourmaline · Smooth · Chips Sticks · 8mm to 12mm

    $9.95

  • Smooth freeform chip watermelon tourmaline beads, multicolor

    Watermelon Tourmaline · Smooth · Freeform Chips · 10mm, 12mm

    $9.95

    Watermelon Tourmaline · Smooth · Freeform Chips · 10mm, 12mm

    $9.95

  • Faceted double terminated Herkimer diamond quartz beads, water clear to heavily included
    Sold out

    Herkimer Diamond Quartz · Faceted · Double Point Terminated · 8mm, 10mm, 12mm

    $28.95

    Herkimer Diamond Quartz · Faceted · Double Point Terminated · 8mm, 10mm, 12mm

    $28.95

  • Rough raw citrine nugget beads in transparent yellow-orange, unpolished

    Citrine · Rough Raw · Nugget · 8mm, 10mm, 12mm

    $9.95

    Citrine · Rough Raw · Nugget · 8mm, 10mm, 12mm

    $9.95

  • Lion Head Silver Jewelry Findings.

    Lion Head · Antique Silver Plated Finding · 12mm · 12pcs

    $4.95

    Lion Head · Antique Silver Plated Finding · 12mm · 12pcs

    $4.95

  • Charoite Stick Shape Beads.

    Charoite · Smooth · Sticks · Graduated 12mm to 20mm

    $13.95

    Charoite · Smooth · Sticks · Graduated 12mm to 20mm

    $13.95

  • Selenite Beads

    Selenite · Smooth · Round · 4mm, 6mm, 8mm, 10mm, 12mm

    $6.95

    Selenite · Smooth · Round · 4mm, 6mm, 8mm, 10mm, 12mm

    $6.95

  • Creamy color peach moonstone beads.

    Peach Moonstone A · Smooth · Round · 8mm, 10mm, 12mm

    $11.95

    Peach Moonstone A · Smooth · Round · 8mm, 10mm, 12mm

    $11.95

  • Close-up of blue and green marbled beads

    Azurite Malachite A+ · Smooth · Round · 6mm, 8mm, 10mm, 12mm

    $19.95

    Azurite Malachite A+ · Smooth · Round · 6mm, 8mm, 10mm, 12mm

    $19.95

  • Detailed view of polished stone beads showing natural banding and texture in beige, caramel, and brown colors.

    Petrified Wood · Smooth · Square Tile · 12mm

    $14.95

    Petrified Wood · Smooth · Square Tile · 12mm

    $14.95

  • Close-up of brown pebbles

    Bronzite · Smooth · Marquise Oval · 10mm, 12mm

    $12.95

    Bronzite · Smooth · Marquise Oval · 10mm, 12mm

    $12.95

  • Smooth round Madagascar rose quartz beads, gentle pink from pale blush to deeper rose

    Madagascar Rose Quartz · Smooth · Round · 6mm, 8mm, 10mm, 12mm

    $7.95

    Madagascar Rose Quartz · Smooth · Round · 6mm, 8mm, 10mm, 12mm

    $7.95

  • Smooth round blue apatite beads, translucent to opaque blue

    Blue Apatite A · Smooth · Round · 6mm, 8mm, 10mm, 12mm, 14mm

    $15.95

    Blue Apatite A · Smooth · Round · 6mm, 8mm, 10mm, 12mm, 14mm

    $15.95

  • Brown Bronzite Beads

    Bronzite · Smooth · Round · 4mm, 6mm, 8mm, 10mm, 12mm

    $6.95

    Bronzite · Smooth · Round · 4mm, 6mm, 8mm, 10mm, 12mm

    $6.95

  • Smooth round silver obsidian beads, deep black with a silvery sheen

    Silver Obsidian · Smooth · Round · 4mm, 6mm, 8mm, 10mm, 12mm

    $4.95

    Silver Obsidian · Smooth · Round · 4mm, 6mm, 8mm, 10mm, 12mm

    $4.95

  • A close-up pile of small round brown beads with a mottled, textured finish.

    Bronzite · Matte · Round · 6mm, 8mm, 10mm

    $6.95

    Bronzite · Matte · Round · 6mm, 8mm, 10mm

    $6.95

  • Smooth round Madagascar rose quartz beads, pale blush to deeper rose pink

    Madagascar Rose Quartz · Smooth · Round · 6mm, 8mm, 9mm, 10mm, 12mm

    $8.95

    Madagascar Rose Quartz · Smooth · Round · 6mm, 8mm, 9mm, 10mm, 12mm

    $8.95

  • Smooth rectangle tiger eye beads, golden brown with a silky shimmer

    Tiger Eye · Smooth · Rectangle · 12mm, 13mm, 15mm

    $12.95

    Tiger Eye · Smooth · Rectangle · 12mm, 13mm, 15mm

    $12.95

  • Smooth rectangle tiger eye beads in polished golden brown with silky shimmer

    Tiger Eye · Smooth · Rectangle · 12mm, 15mm

    $15.95

    Tiger Eye · Smooth · Rectangle · 12mm, 15mm

    $15.95

  • Smooth oval hypersthene beads, grayish black with a metallic-like schiller sheen

    Hypersthene · Smooth · Oval · 12mm, 13mm, 15mm

    $30.95

    Hypersthene · Smooth · Oval · 12mm, 13mm, 15mm

    $30.95

  • Polished Black obsidian beads.

    Black Obsidian · Smooth · Round · 6mm, 8mm, 10mm, 12mm

    $4.95

    Black Obsidian · Smooth · Round · 6mm, 8mm, 10mm, 12mm

    $4.95

  • Smooth round labradorite beads with blue, green, gold and purple labradorescence

    Labradorite · Smooth · Round · 6mm, 8mm, 10mm, 12mm

    $9.95

    Labradorite · Smooth · Round · 6mm, 8mm, 10mm, 12mm

    $9.95

  • Close-up of purple beads with a blurred background

    Deep Purple Amethyst · Smooth · Round · 6mm, 8mm, 12mm

    $7.95

    Deep Purple Amethyst · Smooth · Round · 6mm, 8mm, 12mm

    $7.95

  • Black tourmaline stick beads.

    Black Tourmaline · Smooth · Sticks · 10mm to 12mm

    $10.95

    Black Tourmaline · Smooth · Sticks · 10mm to 12mm

    $10.95

  • Smooth heishi triangle Canadian green jade beads in celadon to emerald green

    Canadian Green Jade · Smooth · Heishi Triangle · 11mm to 12mm

    $20.95

    Canadian Green Jade · Smooth · Heishi Triangle · 11mm to 12mm

    $20.95

  • Dark purple chevron amethyst beads.

    Chevron Amethyst · Smooth · Round · 6mm, 8mm, 10mm, 12mm, 14mm, 16mm

    $7.95

    Chevron Amethyst · Smooth · Round · 6mm, 8mm, 10mm, 12mm, 14mm, 16mm

    $7.95

  • Pink opal stick shape beads.

    Peruvian Pink Opal · Smooth · Sticks · 10mm to 12mm

    $10.95

    Peruvian Pink Opal · Smooth · Sticks · 10mm to 12mm

    $10.95

  • Smooth short cylinder African batik bone beads, black and white zebra and wave motifs

    African Batik Bones · Smooth · Irregular Short Cylinder · 10mm to 12mm

    $13.95

    African Batik Bones · Smooth · Irregular Short Cylinder · 10mm to 12mm

    $13.95

  • Close-up of black beads on a gray background

    Black Obsidian · Matte · Round · 4mm, 6mm, 8mm, 10mm, 12mm

    $4.50

    Black Obsidian · Matte · Round · 4mm, 6mm, 8mm, 10mm, 12mm

    $4.50

  • Polished Round Rainbow Beads For Handmade Jewelry

    Black Rainbow Obsidian · Smooth · Round · 4mm, 6mm, 8mm, 10mm, 12mm, 14mm

    $4.95

    Black Rainbow Obsidian · Smooth · Round · 4mm, 6mm, 8mm, 10mm, 12mm, 14mm

    $4.95

  • A close-up of many small rounded square tiles in a warm off-white or cream color, arranged on a dark background.

    Lemon Chrysoprase · Smooth · Diamond· 12mm, 14mm, 16mm

    $12.95

    Lemon Chrysoprase · Smooth · Diamond· 12mm, 14mm, 16mm

    $12.95

  • Purple Amethyst Beads.

    Amethyst · Smooth · Sticks · Graduated 12mm to 20mm

    $9.50

    Amethyst · Smooth · Sticks · Graduated 12mm to 20mm

    $9.50

  • Smooth oval tiger eye beads, polished golden brown with a silky shimmer

    Tiger Eye · Smooth · Oval · 12mm, 13mm

    $12.95

    Tiger Eye · Smooth · Oval · 12mm, 13mm

    $12.95

  • Black lava stone oval beads with a matte finish and naturally porous volcanic texture for jewelry making.

    Lava · Matte · Tapered Barrel · 8x12mm

    $7.95

    Lava · Matte · Tapered Barrel · 8x12mm

    $7.95

  • Close-up of a pile of small, round, multicolored stones.

    Sodalite Syenite · Smooth · Round · 6mm, 8mm, 10mm, 12mm

    $4.95

    Sodalite Syenite · Smooth · Round · 6mm, 8mm, 10mm, 12mm

    $4.95

  • Matte tube Ghanaian Krobo painted glass beads with blue and red patterns

    Ghanaian Krobo Painted Glass · Matte · Tube · 12mm

    $18.95

    Ghanaian Krobo Painted Glass · Matte · Tube · 12mm

    $18.95

  • Close-up of blue and white marbled stones

    Blue Lace Agate · Smooth · Round · 4mm, 6mm, 8mm, 10mm, 12mm, 14mm

    $7.95

    Blue Lace Agate · Smooth · Round · 4mm, 6mm, 8mm, 10mm, 12mm, 14mm

    $7.95

  • Orange calcite beads.

    Orange Calcite A · Smooth · Round · 6mm, 8mm, 10mm, 12mm

    $18.95

    Orange Calcite A · Smooth · Round · 6mm, 8mm, 10mm, 12mm

    $18.95

  • Smooth round multicolor moonstone beads in peach, cream, gray and warm neutrals

    Multicolor Moonstone · Smooth · Round · 6mm, 8mm, 10mm, 12mm

    $7.95

    Multicolor Moonstone · Smooth · Round · 6mm, 8mm, 10mm, 12mm

    $7.95

  • Natural Clear Quartz Beads For Jewelry Making

    Clear Quartz A · Smooth · Round · 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm

    $7.95

    Clear Quartz A · Smooth · Round · 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm

    $7.95

  • Larimar Chips

    Larimar · Smooth · Chips · 7mm, 12mm

    $10.95

    Larimar · Smooth · Chips · 7mm, 12mm

    $10.95

  • A close-up pile of round stone beads in assorted earthy colors, including brown, beige, cream, gray, and muted red, with some beads showing natural marbling and swirl patterns.

    Petrified Wood · Matte · Round · 4mm, 6mm, 8mm, 10mm, 12mm

    $5.95

    Petrified Wood · Matte · Round · 4mm, 6mm, 8mm, 10mm, 12mm

    $5.95

  • Matte tube Nasa Tribal Krobo painted glass beads with blue zig-zag and white dots

    Nasa Tribal Krobo Painted Glass · Matte · Tube · 12mm

    $18.95

    Nasa Tribal Krobo Painted Glass · Matte · Tube · 12mm

    $18.95

  • Gift card for beads, findings and beading supplies, sent by email

    Gift Cards

    Sometimes it's best to let them choose!

    Shop Gift Cards
  • Blue lace agate beads.

    Blue Lace Agate · Smooth · Sticks · 10mm to 12mm

    $10.95

    Blue Lace Agate · Smooth · Sticks · 10mm to 12mm

    $10.95

  • Close-up of blue cylindrical beads on a gray background
    Sold out

    Lapis Lazuli · Smooth · Barrel Tube · 5x12mm **CLEARANCE**

    $7.95  9.95

    Lapis Lazuli · Smooth · Barrel Tube · 5x12mm **CLEARANCE**

    $7.95  9.95
  • Malachite Beads.

    Malachite · Smooth · Sticks · Graduated 12mm to 20mm

    $11.95

    Malachite · Smooth · Sticks · Graduated 12mm to 20mm

    $11.95

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