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The modern birthstone of October is the Opal, but Tourmaline is also known as the months birthstone. Both October birthstones have many color options and magnetic appeal. 

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Vintage Sea Foam Green Tourmaline & Diamond Engagement Ring
$2,800.
9.25 Carat Rubellite Tourmaline and Diamond Vintage Cocktail Ring
$6,500.
Signed Art Deco High Domed 5 Carat Opal And Diamond Ring
$8,300.
Vivid Green 2 Carat Tourmaline and Diamond 18k White Gold Drop Necklace
$5,300.
Opal Beads Strand 75 Carats Necklace with Antique Watch Fob Clasp
$1,200.
Sold out
4.02 Carat Bicolor Watermelon Tourmaline and Diamond 18k White Gold Ring
$13,750.
123 Carat Rainbow Tourmaline Beads Necklace
$1,800.
Sold out
214 Carat Opal Beads & Pavé Diamond Clasp Necklace
$5,300.
Sold out
Winning Colors Kentucky Derby 18K Gold Necklace
$8,100.
Vintage 3 Carat Green Tourmaline and Diamond 18k Gold Cocktail Engagement Ring
$6,500.
Vintage Art Deco 3.21 Carat Watermelon Tourmaline Estate Ring
$1,650.
Sold out
Vintage 5 Carat Fire Opal East-West Estate Cocktail Ring
$10,700.
Estate Tourmaline Diamond and Ruby Frog 18k Yellow Gold Necklace
$5,500.
Vintage 10.74 Carat Boulder Opal and Diamond Pendant Necklace
$7,900.
Estate 19.95 Carat Mexican Fire Opal Fox Pendant Necklace
$10,000.
Sold out
Vintage 3.98 Carat Indicolite Tourmaline and Diamond Engagement Ring
$5,900.
Vintage 1970s 10 Carat Australian Opal Ring
$2,999. $3,800.
Sold out
Art Nouveau Boulder Opal, Pearl & Sapphire Necklace
$15,000.
Sleek 10 Carat Tourmaline and Diamond Enhancer Necklace
$8,800.
Vintage 9.40 Carat Indicolite Tourmaline and Diamond Cocktail Ring
$6,700.
Sold out
Fiery Australian Black Opal and Diamond Cocktail Ring
$44,600.
Art Deco Inspired Opal Diamond Onyx Sunburst Cocktail Ring
$8,800.
Sold out
Mid Century Opal and Diamond Cocktail Ring
$4,900.
Sold out
Important Lightning Ridge 15 Carat Black Opal Diamond Vintage Necklace
$71,200.
Tourmaline and Black Diamond Snake Pendant
$2,450.
Sold out
Mid Century Rubellite Tourmaline Pave' Diamond Ring
$6,750.
Sold out
Estate Green Tourmaline and Diamond Engagement Ring
$7,000.
Sold out
Oval Blue-Green Tourmaline Diamond Engagement Ring
$4,000.
Sold out
Rubellite Pink Tourmaline Diamond Cocktail Ring
$5,000.
Sold out
Vintage Mid Century Black Opal and Diamond Ring
$9,000.
Sold out
Retro Green Tourmaline Diamond Engagement Ring
$6,625.
Sold out
East West 6.90 Carat Pink Tourmaline and Diamond Ring
$5,250.
Sold out
Vintage Art Nouveau Inspired Cats Eye Tourmaline Pendant Necklace
$7,000.
Sold out
Modern 6 Carat Emerald Cut Green Tourmaline Diamond Pendant Necklace
$5,250.
Sold out
Vintage Indicolite Tourmaline Diamond Pendant Necklace
$3,875.
Sold out
Impressive Art Deco Brushstroke Black Opal Cocktail Ring
$65,000.
Sold out
17 Carat Opal & Diamond Dangle Earrings
$10,500.
Sold out
25 Carat Rainbow Gemstone Unisex Tourmaline Tennis Bracelet
$10,500.
Sold out
GIA Certified 2.76 Carat Paraiba Tourmaline Engagement Ring
$30,000.
Retro 1930s 5.71 Carat Opal Long Cocktail Ring
$1,400.
Sold out
Mid Century Opal Flower Cluster Cocktail Ring
$650.
Sold out
Vintage Swirling Opal & Diamond Cocktail Ring
$1,500.
Vintage Green Tourmaline Diamond Halo Gemstone Engagement Ring
$4,900.