Blue - Dark Blue Crystals

Read the clue to name these blue
Quiz by CorpieQuizzes
Rate:
Last updated: April 11, 2021
You have not attempted this quiz yet.
First submittedApril 11, 2021
Times taken23
Average score57.1%
Report this quizReport
6:00
Enter answer here
0
 / 7 guessed
The quiz is paused. You have remaining.
Scoring
You scored / = %
This beats or equals % of test takers also scored 100%
The average score is
Your high score is
Your fastest time is
Keep scrolling down for answers and more stats ...
Description/Clue
Answer
Usually blue with white veining; allochromatic; found in igneous rock; generally seen in massive form but does form dodecahedral crystals
Sodalite
This corundum can be various colours but commonly known as blue; second hardest mineral known to humans; has enchanted many collectors and jewellers for a long time
Sapphire
History that dates over 5,000 years; prized by pharaohs of ancient Egypt; rock rather than crystal; main component is blue lazurite; deep blues with white and gold flakes; genuine stones have a whitish glow under UV light
Lapis lazuli
Popular crystal; forms when copper ores oxidize; in Middle Ages powder form was used as blue pigmentations in paints and dyes; crystals are soft
Azurite
Description/Clue
Answer
Unusual stone; found in metamorphic rocks rich in aluminum; often inter grown with quartz; used in industry for lining furnaces; has dark speckles and pink and brown areas; rich range of blue, brown, and violet tones
Dumortierite
Forms in thin, blade like crystals that often radiate from center; found in metamorphic rock; white/grey variety is called 'rhaeticite'; unique hardness; also known as 'disthene' meaning "two strengths"
Kyanite
Form of dolerite found only in the Preseli Mts of Pembrokeshire in Wales; composition varies; composed mostly of calcium feldspar and augite; used to build inner circle of Stonehenge
Preseli Bluestone
Comments
No comments yet