Astrophyllite
A variety of Astrophyllite Group
What is Astrophyllite?
Astrophyllite is a rare mineral that often bears a distinctive crystalline form. Derived from the Greek words for “star” and “leaf”, astrophyllite crystals often occur in striking, star-like clusters. The mineral is transparent and usually takes on a golden or brownish hue – though occasionally used for jewelry, it is more often sought after by mineral collectors.
Etymology & Origins
Heavy, soft and fragile, astrophyllite typically forms as bladed, radiating stellate aggregates. It is this crystal habit that gives astrophyllite its name, from the Greek words astron meaning "star" and phyllon meaning "leaf".
Uses & Applications
Astrophyllite is a extremely rare mineral, and as such has very few uses outside of collector's pieces. However, it is often found near other important rocks and minerals, like mica and feldspar, making it an indicator for other commonly mined materials.
Healing Properties
Astrophyllite is believed to reveal a person's true self and help them discover their purpose in life. It is said to remove negative energy and advocate self-love and acceptance. Often called the marriage stone, it is believed to promote fidelity and many say it helps a person deal with major transformations throughout life. It is said to be more powerful when used on the third eye chakra, the soul star chakra, and the crown chakra.
Optical Properties
- Refractive Index
- 1.678-1.758
- Pleochroism
- Strong: deep orange-red, orange-yellow, lemon-yellow
- Optical Character
- Biaxial positive
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Astrophyllite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Astrophyllite Localities Map
See where Astrophyllite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Associated Chakras
Quick Facts
Physical Properties
- Color
- Bronze-yellow, golden yellow, brown to reddish brown
- Hardness (Mohs)
- 3
- Density
- 3.2 - 3.4 g/cm³
- Streak
- Golden
- Luster
- Pearly, Greasy, Sub-metallic
- Crystal System
- Triclinic
Chemical Properties
- Chemical Formula
- K2NaFe2+7Ti2Si8O26(OH)4F
- Elements
- F, Fe, H, K, Na, O, Si, Ti
Also Known As
Identify Astrophyllite Instantly
- Snap a photo, get instant results
- 6,700+ rocks, minerals & crystals
- Discover collecting spots near you
Astrophyllite FAQs
How do I identify Astrophyllite?
Astrophyllite can be identified by its hardness of 3 on the Mohs scale, Bronze-yellow color, Pearly, Greasy, Sub-metallic luster, Triclinic crystal system. Look for these key characteristics when examining specimens.
What color is Astrophyllite?
Astrophyllite typically appears in Bronze-yellow, golden yellow, brown to reddish brown. Color can vary depending on impurities and formation conditions.
How hard is Astrophyllite?
Astrophyllite has a hardness of 3 on the Mohs scale. This makes it a soft mineral that can be scratched easily.