2. HistoryHistory
Invented in the 1970’s by JoshuaInvented in the 1970’s by Joshua
Reynolds and Maris AmbatsReynolds and Maris Ambats
It is now considered something of a toy,It is now considered something of a toy,
but in the seventies, it was a serious piecebut in the seventies, it was a serious piece
of jewelryof jewelry
When they first became popular, the silverWhen they first became popular, the silver
ring was sold for $45, and the gold wasring was sold for $45, and the gold was
sold for up to $250sold for up to $250
3. ChemistryChemistry
The stone in a mood ring isn’t actually aThe stone in a mood ring isn’t actually a
stone. It is a liquid crystal display (LCD)stone. It is a liquid crystal display (LCD)
The LCD is sensitive to small bodyThe LCD is sensitive to small body
temperature changestemperature changes
The LCD will start to twist which is theThe LCD will start to twist which is the
cause for the color changecause for the color change
4. ChemistryChemistry
Before it becomes a liquid crystal, it is aBefore it becomes a liquid crystal, it is a
solid powdersolid powder
It is composed of carbon, hydrogen,It is composed of carbon, hydrogen,
oxygen, and sometimes nitrogen and aoxygen, and sometimes nitrogen and a
few other elementsfew other elements
As temperature increases, the powderAs temperature increases, the powder
melts and then becomes a LCDmelts and then becomes a LCD
5. ChemistryChemistry
As temperature continues to increase, theAs temperature continues to increase, the
liquid becomes isotropic (i.e., exhibitingliquid becomes isotropic (i.e., exhibiting
the same properties when examined fromthe same properties when examined from
all directions)all directions)
Then, it looks and behaves like waterThen, it looks and behaves like water
6. ChemistryChemistry
After this, it is no longer in its liquid crystalAfter this, it is no longer in its liquid crystal
phasephase
Reducing the temperature returns the fluidReducing the temperature returns the fluid
back to the liquid crystal phaseback to the liquid crystal phase
