December Birthstone Tanzanite & Turquoise: Rare Blue, Ancient Earth

December — the month of the winter solstice, the longest night, the turn toward the light — arrives with two blue birthstones as different as possible from each other in origin, history, and character. Tanzanite is one of the rarest gems on Earth, discovered in 1967 in a single geological event that will never repeat itself. Turquoise has been with humanity for 6,000 years, found in the mines of ancient Egypt, worn by Aztec kings, and threaded into Navajo jewelry that represents an entire people’s relationship with the sky and the earth. Together, they span the full range of what “blue” can mean: the electric violet-blue of the newest gem on Earth, and the sky-meets-earth blue of one of the oldest.

Tanzanite: Rarer Than Diamond

What Is Tanzanite?

Tanzanite is a blue-violet variety of the mineral zoisite (Ca₂Al₃(SiO₄)(Si₂O₇)O(OH)) — a calcium aluminum silicate with the element vanadium responsible for its extraordinary color. What makes tanzanite genuinely unique among gemstones is its strict geological confinement: it is found only in a tiny mining area near the foothills of Mount Kilimanjaro in northern Tanzania, covering approximately 7 square kilometers.

Geologists estimate that the specific tectonic conditions that created tanzanite occurred approximately 585 million years ago and were so unusual that the probability of similar deposits existing elsewhere on Earth is essentially zero. When the current tanzanite mines are exhausted — estimated within the next 25–50 years — there will be no more.

Mohs hardness: 6–7 — moderate; requires some care, particularly against knocks and scratches.

Trichroism: Tanzanite is strongly trichroic — it shows different colors from different crystal axes: blue, violet, and burgundy/red. When cut, gem cutters must decide which axis to emphasize, and the orientation of the cut determines whether the stone appears more blue or more violet.

Heat Treatment: Nearly all commercial tanzanite is heat-treated (gently heated to approximately 400°C), which removes the brownish component and emphasizes the blue-violet color. This is universally accepted in the gem trade and does not negatively affect the stone.

Discovery

The story of tanzanite’s discovery reads like a fable. In 1967, Maasai herders in northern Tanzania noticed blue crystals in the earth — likely exposed by a brush fire or lightning strike that had heated the ground, thus “activating” the trichroic color shift from brownish to vivid blue-violet. The crystals were eventually identified as a new variety of zoisite, and Tiffany & Co. acquired distribution rights.

Henry Platt of Tiffany, recognizing that “blue zoisite” would not sell well (it rhymed with “blue suicide”), renamed the gem tanzanite after its country of origin — a marketing decision that proved prescient. Tiffany launched tanzanite in 1968 with the tagline: “The most beautiful blue stone discovered in 2000 years.”

Chakra Energy

Third Eye Chakra (Ajna) Tanzanite’s violet-blue frequency resonates powerfully with the third eye chakra — the center of intuition, inner knowing, and visionary consciousness. Working with tanzanite during meditation can support access to deep intuitive guidance and an expanded perspective beyond ordinary perception.

Crown Chakra (Sahasrara) The violet component connects to the crown chakra, supporting spiritual awareness and the experience of connection to higher consciousness.

Throat Chakra (Vishuddha) The blue component connects to the throat chakra, supporting authentic self-expression — the courage to speak one’s deepest truth with clarity and integrity.

Core Meanings

Spiritual Awakening Tanzanite is associated with the rapid acceleration of spiritual development — the kind that happens not through long slow practice alone, but through genuine shifts in consciousness and perception. It is one of the stones most associated with spiritual awakening in the modern era.

Integration of Heart and Mind Working across the throat, third eye, and crown chakras, tanzanite facilitates the integration of intuitive (heart/feeling) and analytical (mind/thinking) ways of knowing. This is the capacity to know something logically AND feel it as true simultaneously.

Compassionate Communication Tanzanite supports speaking truth compassionately — finding words that are simultaneously honest and kind, that serve the relationship rather than just satisfying the need to be right.

Turquoise: Sky and Earth in One Stone

What Is Turquoise?

Turquoise is a phosphate mineral (CuAl₆(PO₄)₄(OH)₈·4H₂O) — the presence of copper gives it its characteristic blue-green color. Pure turquoise is an intense sky blue; iron impurities shift it toward green. The “veining” or matrix pattern seen in many turquoise pieces is the surrounding rock (typically brown limonite or black chert) left as the stone formed.

Mohs hardness: 5–6 — relatively soft; susceptible to oils, cosmetics, and chemicals. Remove before swimming, showering, or applying lotions.

Major Sources: Iran/Persia (historically the finest blue turquoise, called “Persian turquoise” or “robin’s egg blue”), USA (Arizona — Sleeping Beauty mine; Nevada; New Mexico — historically Cerrillos), Egypt (historically Sinai Peninsula), China, Tibet, Mexico.

6,000 Years of Human History

No other gemstone has accompanied human civilization as consistently as turquoise.

Ancient Egypt (4,000 BCE) The Sinai Peninsula mines were already operating by 4,000 BCE — among the oldest known mining operations in human history. Turquoise was found in the tomb of Queen Zer (First Dynasty), making it the oldest known jewelry in the world. Hathor, goddess of the sky and love, was called “Lady of Turquoise.” The Egyptians called turquoise mefkat — “joy” and “delight.”

The Aztec Empire Aztec rulers wore turquoise as the symbol of divine authority. Turquoise mosaics covered ceremonial masks, shields, and objects of sacred power. The word chalchihuitl (turquoise) was nearly synonymous with preciousness itself. When Hernán Cortés arrived in Mexico in 1519, Moctezuma received him wearing extraordinary turquoise pieces — the Aztec belief was that Cortés was the returning god Quetzalcóatl, and turquoise was the appropriate adornment for such a meeting.

Native American Traditions Turquoise holds one of the most sacred places in the spiritual traditions of many Native American peoples. For the Navajo, turquoise represents the sky and is one of the four sacred stones (along with white shell, abalone, and jet) that correspond to the four sacred mountains. For the Zuni, turquoise is the stone of the sky Father. Apache warriors carried turquoise for protection. Pueblo peoples use turquoise in ceremonial contexts stretching back thousands of years.

The famous Sleeping Beauty turquoise mine in Arizona — named for the mountain’s silhouette, which resembles a sleeping figure — was one of the largest producers of consistently colored sky-blue turquoise. It closed in 2012, driving prices significantly higher.

Tibet Tibetan turquoise is typically greener than Persian or American varieties (due to higher iron content). It holds enormous importance in Tibetan Buddhist culture — worn for protection, used in prayer beads (malas), and exchanged as a symbol of alliance and trust between families and communities.

Chakra Energy

Throat Chakra (Vishuddha) Turquoise is one of the most powerful stones for the throat chakra — supporting authentic, compassionate communication; the courage to speak truth; and the capacity to receive and integrate others’ perspectives. It is the stone of speaking from the heart rather than merely from the mind.

Third Eye Chakra (Ajna) Turquoise also supports the third eye, particularly in traditions where it is used for protection and navigation. Turquoise shamans and healers across many traditions have used it to access guidance from beyond ordinary perception.

Core Meanings

Protection Across virtually every tradition where turquoise has been used — Egyptian, Aztec, Navajo, Apache, Tibetan — its primary identity is as a protective stone. It is carried for journeys (physical and spiritual), for battles, and as a general talisman against harm and misfortune.

Communication and Truth The sky color that turquoise carries is also the color of open space — the space where communication happens. Turquoise supports honest, clear, heart-centered communication and helps its wearer find the right words for difficult conversations.

Friendship and Alliance Turquoise has a long history as a gift between friends and allies. Its energy supports the deepening of trust, the building of genuine connection, and the capacity to be vulnerable with those we love.

Healing and Wholeness Many Native American healing traditions use turquoise as a healing stone — not because it cures disease, but because its energy supports the integration of body, mind, and spirit into a unified whole. It is a stone of holism in the most literal sense.

Working with December’s Birthstones

Wearing

Tanzanite looks stunning set in white gold or platinum, which enhances its blue-violet cool tones. Wear it for meditation, creative work, or any situation where you need access to intuitive clarity and compassionate communication.

Turquoise is traditionally set in silver (especially in Navajo and Pueblo traditions). Turquoise is one of the few stones that can handle daily wear as a statement piece. It is appropriate as a daily talisman — a stone you wear not for special occasions, but as a steady companion.

Meditation Practice with Tanzanite

Lie down and place tanzanite on your forehead (third eye) or hold it in your non-dominant hand. Breathe slowly and invite a question you genuinely want insight on. Don’t force an answer — simply remain open and notice what arises, whether as images, words, physical sensations, or a quiet knowing. After five to ten minutes, sit up and record what came.

Protective Practice with Turquoise

Turquoise worn or carried on the person serves as a continuous protective talisman. If beginning a journey, a new chapter, or a particularly challenging period: hold the turquoise, set the intention of protection and guidance, and carry it with you. In many traditions, turquoise given as a gift carries the protective energy of the giver — making it among the most meaningful stones to give someone you care about.

Cleansing Methods

Tanzanite:

Moonlight (gentle; recommended)
Sage or palo santo smoke
Sound: Tibetan singing bowl
Avoid: ultrasonic cleaners, steam, sudden temperature changes, water (risk of damage)

Turquoise:

Moonlight
Dry sage smoke (preferred)
Sound: singing bowl
Avoid: water (damages the stone and can alter color), chemicals, oils, ultrasonic cleaners, direct sunlight (may fade color)

December’s birthstones are, in their different ways, about the same thing: the connection between earth and sky, between the tangible and the transcendent, between what is ancient and what is newly discovered. Turquoise has been with us from the beginning — the blue of the sky in stone form, carried by every civilization that found it, always for protection, always for communication, always as a reminder that the sky is above us even when we cannot see it.

Tanzanite is almost impossibly rare, born from a geological event 585 million years ago that will never happen again on this Earth. It carries something of that extraordinariness in its color — the violet-blue that doesn’t quite belong to the known spectrum, that sits at the edge of visible light as if reaching toward something beyond.

To work with December’s stones is to hold both of these things: the ancient and the rare, the familiar sky and the extraordinary discovery, the long lineage of human hands that have held turquoise for six thousand years — and the brief, brilliant window of time we have with tanzanite before it is gone.

Oiyo