Onyx Argentinian Skull 5" / 1163g by Skullis

Onyx Argentinian Skull 5" / 1163g by Skullis Upper jaw only

You are looking at a Argentinian Onyx  skull. The skull is 5.0 inches long from front to back.

Mineral Information:

Argentinian Onyx is a decorative stone that is not true geological onyx. It is actually a form of banded calcite, sometimes called onyx marble or Mexican/Argentinian onyx, depending on where it is mined. Argentina is one of the best-known sources of high-quality material, particularly from the northwestern provinces.

What is it?

Despite the name, Argentinian Onyx is composed primarily of calcium carbonate (calcite) that formed from mineral-rich groundwater in caves or around hot springs. As layers of calcite were deposited over thousands of years, they created the stone's distinctive translucent bands.

True onyx, by contrast, is a variety of chalcedony (quartz) with a hardness of 6.5–7 on the Mohs scale, while Argentinian Onyx has a hardness of only about 3, making it much softer.

Appearance

Argentinian Onyx is prized for its beautiful flowing bands and translucency.

Common colors include:

• Green (the most recognizable variety)
• Honey and golden brown
• White and cream
• Amber
• Pink
• Reddish-brown
• Multicolored combinations

The bands often resemble flowing water or layers of clouds, making every piece unique.

Physical Properties

• Composition: Banded calcite
• Hardness: 3 (Mohs)
• Luster: Vitreous to silky polish
• Transparency: Translucent
• Crystal System: Trigonal (calcite)

Because it is soft, it scratches much more easily than quartz.

Uses

Argentinian Onyx is widely used for decorative purposes:

• Bowls
• Vases
• Eggs and spheres
• Candle holders
• Chess sets
• Animal carvings
• Tabletops
• Countertops (in low-wear applications)
• Lamps that glow when backlit

Its translucency makes it especially popular for illuminated panels and decorative lighting.

Metaphysical Meaning:

Argentinian Onyx is associated with:

• Emotional balance
• Inner peace
• Stress reduction
• Grounding and stability
• Patience during periods of change
• Encouraging thoughtful decision-making
• Creating a calm atmosphere in the home

Green varieties are often associated with the heart chakra, symbolizing compassion, emotional healing, and personal growth.

Mineral Care:

Because it is calcite, it requires gentle care:

• Clean with a soft damp cloth.
• Avoid acidic cleaners like vinegar or lemon juice, which can etch the surface.
• Keep away from abrasive cleaners.
• Protect from impacts and scratches.
• Avoid prolonged exposure to acidic foods or chemicals.

Disclaimer:

No information here is intended to diagnose, treat or cure ailments or afflictions of any kind. One should always consult a medical professional if a serious issue presents itself.