Argillite is a type of rock that is transitional between slate and shale. The quarry site for Haida argillite is found on the Islands of Haida Gwaii also known as the Queen Charlotte Islands at the Slatechuck site.

Applications of Argillite: Argillite is used in many industries. Ceramic components are made from it, which are subsequently used in construction, production of refractories and cement. The mineral is successfully used in the foundry, pulp and paper and rubber industries.

How to Determine if an Argillite Carving is Real:

1. Weight. The weight of argillite is another way to determine real argillite from imitation.
2. Moh’s Hardness Test.
3. Inconsistencies in the Stone.
4. Buy From a Reputable Source.
5. Presence or Lack of Signature.
6. Less Conventional Argillite Designs & Structures.
7. Presence of Inlays.

Argillite ( /ˈɑːrdʒɪlaɪt/) is a fine-grained sedimentary rock composed predominantly of indurated clay particles. The term pelitic or pelite is often applied to these sediments and rocks.

Argillite is highly compact sedimentary or slightly metamorphosed rock that consists largely or wholly of particles of clay or silt but lacks the tendency to split along flat planes of weakness like shale or the cleavage characteristic of slate.

Chert has four diagnostic features: the waxy luster, a conchoidal (shell-shaped) fracture of the silica mineral chalcedony that composes it, a hardness of seven on the Mohs scale, and a smooth (non-clastic) sedimentary texture. Many types of chert fit into this categorization.

This silica was pushed out into gaps, cracks and burrows in the chalky mud to form nodules or layers of flint. These flints have a white outer layer (cortex), and are black inside. They can come in very complicated, bulging shapes, or with spikes, holes and cavities.

Inside the nodule, flint is usually dark grey, black, green, white or brown in colour, and often has a glassy or waxy appearance. A thin layer on the outside of the nodules is usually different in colour, typically white and rough in texture. The nodules can often be found along streams and beaches.

Flint is a microcrystalline rock made of silica and is considered to have begun forming soon after the deposition of Chalk. The silica replaces the original Chalk carbonate grain by grain. The carbonate has to be dissolved with silica precipitated in its place.

Flint was widely used historically to make stone tools and start fires. It occurs chiefly as nodules and masses in sedimentary rocks, such as chalks and limestones.

A diamond is a brillant stone, To catch the world’s desire; An opal holds a fiery spark; But a flint holds fire.

21. Flint | English | Class 4

• Q1. Answer the following questions : 1.)
• The precious stones mentioned here are : (a) emerald. (b) ruby.
• A flint lies in the mud. 3.) Is a flint attractive or colourful ?
• No, a flint is not attractive or colorful like other precious stones. 4.) What can a flint produce ?
• A flint can produce fire. Q2.

Answer: A brilliant is a diamond or other gemstone cut in a particular form with numerous facets so as to have exceptional brilliance. The shape resembles that of a cone and provides maximized light return through the top of the diamond. Because of its brilliant shine, lustre and hardness.