Stone Guide
All Mary MacGill stones and pearls are definitively one-of-a-kind, personally sourced and selected by Mary for their unique character and natural inclusions.
Aquamarine
Derived from the Latin term aqua marinus, meaning "water of the sea," aquamarine comes in a vibrant array of ocean hues and is primarily mined in Brazil. In ancient Greek mythology, the talismanic stone was gifted by mermaids to sailors to protect them in stormy seas. Today, it is believed to increase tranquility and clarity in communications.
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Amber
Fossilized tree resin with a shimmering golden hue and mesmerizing inclusions, Amber has been prized for its beauty and healing properties since Neolithic times. It is considered a purifier that absorbs negative energy and stimulates regeneration and healing, physically and emotionally.
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Baroque Pearl
Featuring organic, non-spherical shapes, our Baroque Pearls are cultured in fresh water and, like Keshi pearls, they are formed around tissue, instead of a nuclear bead. Pearls are considered symbols of purity, love, and union, and have been used in wedding ceremonies since the ancient Hindu god Krishna plucked the first pearl from the ocean and gave it to his daughter, Pandaia, on her wedding day.
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Island Stone
The term Island Stones characterizes the diverse semi-precious stones Mary finds while strolling the sands of Block Island and the beaches she encounters on her travels. To date, these treasures include Agates, Basalt, Jasper, Quartz, and Feldspar stones.
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Jasper
As part of the Chalcedony family, which comprises stones composed of fine intergrowths of Quartz and Morganite, Jasper comes in many colors, patterns, and forms. Mary primarily uses Red Jasper, a rusty stone with black or white veins, and a variation she calls Picasso Jasper, as its coloring recalls its namesake’s Cubist palette. Mined in the Western United States — specifically Wyoming, Montana, and Utah — Jasper is traditionally used in Native American culture for rain making. It is also known as the “Supreme Nurturer,” as it is a grounding stone said to promote stability and awareness.
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Kyanite
Showcasing mainly deep blue hues — its name comes from the Greek word kyanos, which means “deep blue” — Kyanite also appears in off-white, grey, and green shades. Found in Brazil, India, Kenya, and Zimbabwe, the stone is believed to promote communication, repair damaged relationships (both physical and spiritual), and facilitate dream interpretation.
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Keshi Pearl
The word “keshi” comes from the Japanese “keshinomi,” which means poppy seed — an apt descriptor of these small pearls formed by Akoya oysters. Mary uses seawater-cultivated Tahitian Keshi pearls, ranging in hue from dark charcoal to silver grey. Technically byproducts of pearl cultivation, Keshi pearls form around loose tissue in the mollusk, rather than a nuclear bead, which gives them a freeform shape.
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Labradorite
A mesmerizing stone with florescent luminescence, Labradorite belongs to the feldspar family of stones, which makes up about 60 percent of the Earth’s crust. Upon first glance, this enigmatic stone appears deep grey, but when the light illuminates its veins, it shines bright blue.
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Lapis
Ranging from shimmering deep blue to purple, Lapis is a metamorphic rock renowned for fostering self-expression and wisdom — so much so that it’s called the “wisdom stone.” It is also known to promote enlightenment and truth, and has been prized since ancient times for its beauty and power.
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Mineral Diamonds
Commonly referred to as “rustic diamonds,” mineral diamonds are those that form with the presence of other mineral impurities (including iron, nitrogen, and boron) which is what produces the unique cloudy or colorful aspect of the stone. Perfect in structure, diamonds are referred to as the “king of gems,” for their extraordinary light reflection and dispersion, and as the hardest natural substance known. Its name is derived from the Greek adamas, meaning “indomitable,” “unbreakable,” or “untamable."
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Moonstone
A Feldspar family stone also known as the “psychic stone,” Moonstone first appears white, then flashes bright rainbow or blue. Known as the light sister of Labradorite, it’s primarily found in Sri Lanka, India, and Madagascar, and according to Hindu myth is constructed of solidified moonbeams. Revered in many cultures for its lunar connection, Moonstone is said to be at its most powerful during the full moon.
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Opal
Derived from the Greek word opalus, which means "changing color," Opal comes in electric shades of blue, orange, and white featuring fiery flashes. While most Mary MacGill Opals come from Australia, some Opals are over 50 million years old, dating back to the Cretaceous period. Today, the kaleidoscope stone is also known as the “eye stone,” as it is believed to spark its wearer's creativity.
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Portoro Marble
Also known as black and gold marble, Portoro Marble showcases a velvety black base with golden veins, ranging from sunny yellow to honey. Primarily found in the Ligurian province of La Spezia, Italy, it is considered a stone of potential that promotes peak meditation states, supports dream recall, and enhances self-control and serenity.
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Roman Travertine
Reminiscent of perfectly tumbled white and tan beach stones, Roman Travertine is a form of limestone deposited by mineral springs. Originally mined in Tivoli, Rome, where we still source our Roman Travertine, it is most commonly used as a building material, as seen in Sacré-Coeur, the Colosseum, the Getty House, and many works by Mies van der Rohe.
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Rutilated Quartz
A delicate combination of Crystal Quartz and Rutile (a titanium mineral), Rutilated Quartz is also known as “Venus’ hair stone” due to its golden threads. Found in Madagascar, South Africa, India, Brazil, Sri Lanka, and Switzerland, the variegated stone is believed to increase focus and self-reliance.
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Shark's Teeth
The use of shark’s teeth in jewelry dates back to ancient Hawaii, where it was believed that the fish’s teeth possessed protective powers. Mary received her fossilized shark’s teeth — which range in hue from brown to yellow to blue — from her grandparents in Florida, who found it on their beach walks.
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Tahitian Pearl
Created by the Black Lip Oyster, these cultured seawater pearls were originally cultivated in Tahiti and are primarily farmed around French Polynesia. While they are renowned for their rich charcoal grey hue, they also appear in white and silver with green, peach, and gold undertones — and are considered symbols of wisdom, independence, and strength.
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Tourmalated Quartz
This composite stone found in Brazil boasts a neutral Crystal Quartz background variegated with Black Tourmaline. Clear Quartz is said to amplify the grounding qualities of Black Tourmaline, and the two minerals work in harmony to clarify the mind and deflect negative energy.
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Tourmaline
Extraordinarily colorful, Tourmaline ranges in hue from maroon to yellow to green to blue to black — a range that, according to Egyptian legend, results from the stone’s journey from the Earth’s center through a rainbow. Today, the stone is found in Brazil, India, Bolivia, Tanzania, and Sri Lanka, and each hue is said to possess a particular power. Pink Tourmaline, for example, is believed to promote love and understanding when faced with fear.
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Turquoise
Renowned for its brilliant, opaque blue-green hue and protective powers, Turquoise has served as a talisman for warriors, shamans, and kings for centuries. In Ancient Egyptian burial ceremonies, it was employed to guard the passage of the dead. Our Turquoise is primarily mined in the United States, but the stone is also found in Mexico, Iran, Chile, China, and Tibet.
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