| Mineral | TURQUOISE |
| Chemistry | Cu(AlFe 3+ ) 6 [(OH) 4 |(PO 4 ) 2 ] 2 ยท 4H 2 O |
| Class | Phosphates |
| Uses | as an ornamental stone for carving and jewelry. |
| Color | pale Green blue -Green turquoise blue |
| Luster | Waxy |
| Transparency | specimens are opaque. |
| CrystalSystem | Triclinic |
| CrystalHabits | include crystals rarely large enough to see, usually massive, cryptocrystalline forms as nodules and veinlets. |
| Cleavage | Perfect on {001}good on {010} |
| Fracture | perfect in two direction, but is not often seen. |
| Hardness | 5 - 6 |
| SpecificGravity | 3.01 g/ccm |
| Streak | greenish white |
| Characteristics | color can change with exposure to skin oils. |
| Indicators | crystal habit, hardness, luster, color and associations. |
| DensityNote | average |
| IMAStatus | Approved - Published prior to 1959 (pre-IMA) - Gra |
| CellParameters | a = 7.42b = 7.62c = 9.91 α=68.61°β=69.71°γ=65.08° |
| Ratio | a:b:c = 0.974 : 1 : 1.301 |
| OpticalType | Biaxial (+) |
| RI | n α =1.610 n β =1.615 n γ =1.650 |
| Birefringence | δ=0.040 |
| SurfaceRelief | Moderate |
| Strunz | 7/D.15-40 7 : PhosphatesArsenatesVanadates D : Water-bearing phosphates with unfamiliar anionsmostly cations of small size: BeLi 15 : Turquoise group |
| FolkLore | TURQUOISE: Is said to aid in clear communication between people, including friends, family, co-workers, etc. It is also thought to help bring understanding and wisdom. It is said to encourage spontaneity while aiding in communication in romance and strengthen intuition in relation to romantic relationships. |
