Name: ESC1000L - カルサイト (ESC1000L - Calcite)
Uploaded: 2021-01-14T05:35:00.000Z
Duration: 1 min 33 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

様態の副詞

Calcite is a very common mineral, especially

A brief examination of a specimen of calcite

one should be able to find several flat, cleavage

One important thing to notice about these cleavage surfaces

These intersections give calcite a tendency

This is a very important feature that distinguishes calcite

from another mineral on our list, halite.

When we do a test of the hardness of calcite

we start with a glass which has a hardness a 5.5.

When we attempt to scratch the glass with a crystal of calcite

This tells us that the hardness of calcite

When we attempt to scratch the calcite crystal

with a fingernail, which has a hardness is 2.5,

we find that the fingernail does not scratch it.

This would indicate that calcite's hardness

of calcite somewhere between 5.5 and 2.5.