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Fleur Delacour wearing Muriel's tiara.

"Zis is nothing. At ze Palace of Beauxbatons, we 'ave ice sculptures all around ze dining chamber at Chreestmas. Zey do not melt, of course… zey are like 'uge statues of diamond, glittering around ze place."
Fleur Delacour.[src]

A diamond is a very valuable gemstone with remarkable physical characteristics: it has the highest hardness and thermal conductivity of any bulk material and a relatively high optical dispersion which results in its characteristic luster.[1]

The Firebolt broomstick sports a handle that is treated with a polish described as being diamond-hard.[2]

For Christmas, in 1996, Fred and George Weasley offered their mother a brand-new midnight blue witch's hat glittering with what looked like tiny starlike diamonds.[3] The downstairs windows of Malfoy Manor were diamond-paned.[4] Diamonds were among the gems set into Muriel's tiara, as well as moonstones.[5]

Diamonds also filled the Hufflepuff House points hourglass at Hogwarts School of Witchcraft and Wizardry.[6]

Author comments

@HarmonicalHero: "WHAT ARE THE GEMS IN THE HUFFLEPUFF HOURGLASS!?! ...Oh! Also thanks for all that you do. :)"
@jk_rowling: "Diamonds, of course. Because that's what Hufflepuffs are (some a little rougher than others). X"
— Twitter conversation with J. K. Rowling.[6]



Diamonds inside the Hufflepuff house point hourglass.

Notes and references

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