Gemstone Guide

Learn how to choose the right gemstone jewelry for you and your lifestyle.

Explore Gemstones from A-Z

Choosing the right gemstone jewelry starts with understanding the color (or hue), clarity, and carat. Some believe that each gemstone also brings its own unique powers, from inspiring creativity to warding off evil. While many gemstones can be found in nature, lab-grown gemstones are also an excellent option. Whether you’re shopping for a gift or looking to treat yourself to something special, here’s what you should know about the gemstones KAY has to offer.
Kay Alexandrite – Oval-cut alexandrite gemstone displaying its rare color-changing effect with green and purplish-red hues in a side-by-side comparison.

Alexandrite

Popular for its color-changing properties, Alexandrite is thought to bring luck, good fortune, and love. 



• Alternative birthstone: June
• 55th anniversary gemstone

• Changes from bluish green in daylight to purplish red in incandescent light

• Known for its toughness and resistance to heat, light, and everyday chemicals

Aquamarine

Symbolizing hope, health, and youth, aquamarine is considered a powerful meditation tool that heightens mental clarity.



• Birthstone: March

• 19th anniversary gemstone

• Comes in shades of blue with hints of cyan and green

• Can be somewhat brittle and is sensitive to chips and scratches

Kay Aquamarine – Emerald-cut aquamarine gemstone with a pale icy blue color, step-cut facets, and elegant rectangular silhouette.
Kay Amethyst – Oval-cut amethyst gemstone featuring rich purple color, exceptional clarity, and brilliant faceted sparkle.

Amethyst

The color of royalty and a traditional symbol of peace, tranquility, and protection, amethyst is thought to inspire creativity and promote intelligence.



• Birthstone: February

• 6th anniversary gemstone

• Ranges from pale lilac to deep violet

• A member of the quartz family with good toughness

Blue Topaz

Symbolizing wisdom, sincerity, and bravery, blue topaz is said to have temperature-cooling properties that soothe intense moods.



• Birthstone: December

• 4th anniversary gemstone

• Although topaz comes in a wide range of colors, blue is the most popular

• Excellent durability makes it perfect for everyday wear

Kay Blue Topaz – Oval-cut blue topaz gemstone showcasing vibrant ocean-blue color and dazzling faceted brilliance.
Kay oval-cut citrine gemstone featuring rich golden-orange color, precision faceting, and brilliant light reflection on a dark background

Citrine

Taking its name from the French word for lemon, citrine is said to represent happiness, power, and health, while helping to fight feelings of depression and insecurity.



• Birthstone: November

• Yellow hues ranging from light to golden to brownish red

• Good toughness makes it suitable for everyday wear

Diamond

A classic choice for engagement rings because of their elegance and versatility, diamonds symbolize eternal love, invincibility, and fearlessness.



• Birthstone: April
• 60th anniversary gemstone

• Little or no color is the most popular, but they come in a variety of hues

• Considered the hardest gemstone, they are extremely durable

Kay brilliant-cut diamond viewed from the side, showcasing exceptional clarity, precise faceting, and radiant sparkle against a neutral background
Kay emerald-cut emerald gemstone featuring vivid green color, step-cut facets, and exceptional clarity on a light neutral background

Emerald

Said to promote fertility and symbolize unchanging love, rebirth, and faithfulness, emeralds are one of the big three most popular gemstones.


• Birthstone: May

• 20th anniversary gemstone

• Dark to medium green with hints of blue

• Often scratch and chip easily and must be cleaned gently

Morganite

Said to bring healing, compassion, assurance, and promise, morganite combines feminine colors with a radiant sparkle.



• Ranging from light pink to subtle orange pink

• Often paired with rose gold and white gold

• Very good toughness makes it suitable for everyday wear

Kay emerald-cut morganite gemstone showcasing soft peach-pink color, elegant step-cut facets, and exceptional clarity against a light neutral background
Kay oval-cut black onyx gemstone featuring deep jet-black color, faceted surface, and polished luster on a light neutral background

Onyx

Striking and surprisingly affordable, onyx has a reputation for sharpening wits, eliminating negative thinking, and bringing spiritual inspiration to the wearer.



• 7th anniversary gemstone

• Solid black, uniform, and consistent in color

• Often paired with sterling silver or white gold

• Good toughness, durable, and easy to care for

Opal

Famously called the “queen of gems” by Shakespeare, opals represent hope, purity, and confidence and were said to be a rainbow turned to stone.



• Birthstone: October

• 14th anniversary gemstone

• Popular for their colorful flecks, known as play-of-color

• Contain a high percentage of water and should be treated with extra care

Kay oval black opal gemstone featuring vibrant flashes of green, red, and orange play-of-color on a dark body tone
Kay cushion-cut peridot gemstone featuring vibrant lime-green color, brilliant faceting, and exceptional clarity on a light neutral background

Peridot

Originating from deep within volcanoes, peridot is thought to ward off evil and bad dreams. It also symbolizes luck, peace, strength, and success.



• Birthstone: August

• 16th anniversary gemstone

• Ranges from yellowish grass green to dark olive green

• Fair toughness; not ideal for everyday wear

Pearl

Known for their elegance, both natural and cultured pearls are associated with the moon and signify charity, wisdom, and purity.



• Birthstone: June

• 30th anniversary gemstone

• Most often come in pink, silver, cream, gold, gray, blue, black, and green

• Look for luster and smoothness when choosing a pearl

Kay cultured freshwater pearl featuring soft white luster, smooth surface, and classic round shape on a light neutral background
Kay round-cut ruby gemstone featuring vivid red color, brilliant faceting, and exceptional sparkle on a light neutral background

Ruby

One of the big three most popular gemstones and known as the King of the Gems, ruby is thought to bring power, courage, and good fortune.



• Birthstone: July

• 40th anniversary gemstone

• Red with hints of brown, purple, or pink

• Excellent toughness and suitable for everyday wear

Sapphire

One of the most popular gemstones, and one of the big three, sapphires symbolize faithfulness, honesty, and truth.



• Birthstone: September

• 45th anniversary gemstone

• Recognizable for their vibrant blue color, but also exist in other hues

• Known for their clarity and hardness; ideal for everyday wear

Kay oval-cut sapphire gemstone featuring rich royal blue color, brilliant faceting, and exceptional clarity on a light neutral background
Kay round-cut tanzanite gemstone featuring violet-blue color, brilliant faceting, and exceptional sparkle on a light neutral background

Tanzanite

Relatively new to the gemstone world, tanzanite is believed to have mellowing properties, giving the wearer a sense of calm.



• Alternative birthstone: December

• 24th anniversary gemstone

• Sapphire blue and deep purple, based on lighting conditions and viewing angle

• Poor toughness; can be vulnerable to scratches and chips

Garnet

The garnet embodies friendship, loyalty, devotion, trust, and sincerity. It is also said to contain protective energies that keep nightmares at bay.



• Birthstone: January

• 2nd anniversary gemstone

• Colors range from ruby red to smoky brown, with deep red being the most popular

• Fair to good toughness; good for everyday wear

Kay oval-cut garnet gemstone featuring deep red color, brilliant faceting, and rich sparkle on a light neutral background
Kay princess-cut pink tourmaline gemstone featuring vibrant rosy pink color, sharp faceting, and brilliant sparkle on a light neutral background

Tourmaline

One of the more colorful gemstones, tourmaline represents compassion and wisdom and is thought to promote healing, flexibility, and spirituality.



• Alternative birthstone: October

• 8th anniversary gemstone

• Comes in many colors with pink being one of the most popular

• High durability makes it suitable for everyday wear

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How to Choose the Right Gemstone Jewelry | Kay Jewelers | Kay