Rktcr

Rktcr

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Rktcr Achievements

Here is the full list of all 40 Rktcr achievements.

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  • PhD in Rktcr

    Completed all the impossible challenge levels.

  • Extracurricular Activites

    Completed a user-created challenge level.

  • I Have Seen The Unicycle.

    Not as tricky to complete as you might think; it just takes some time.

  • Never the Same

    Unless you copy/paste the path, I guess.

  • Azurite

    Copper(II) carbonate produced as copper ore weathers. Was used as blue pigment in the middle ages.

  • Emerald

    Beryl tinted green by chromium or vanadium. Mined all over the world, predominately in Colombia and Zambia.

  • Opal

    Hydrated amorphous silica. Its brilliant play of color results from diffraction and interference of light passing through internal planes of silica spheres.

  • Ruby

    Corundum tinted by chromium. Synthetic ruby is used in some lasers.

  • Chrysotile

    Fibrous silicate. A common, naturally-occurring asbestos.

  • Galena

    Lead(II) sulfide. A commercially-important lead ore that occasionally contains silver.

  • Graphite

    Carbon. Used in pencils. Also, as an industrial lubricant.

  • Hematite

    Iron(III) Oxide. Used in the pigment Ochre.

  • Quartz

    Linked silicon-oxygen tetrahedra. The second-most common mineral in the earth's crust.

  • Diamond

    Carbon. Produced under inhumane working conditions, sometimes used to fund horrific conflicts.

  • Obsidian

    Volcanic glass. The oldest known obsidian tools date to 700,000 BCE.

  • Calcite

    Calcium carbonate. A common component of both limestone and marble.

  • Scheelite

    Calcium tungstate. Surprisingly heavy. Cut gems can be fragile.

  • Tourmaline

    Boron silicate. Multi-colored crystals result from changing concentrations of trace elements during crystallization.