Discover the Science Behind Reason Diamonds Shine - Explained!

While I was looking at the backlight regarding the bicycle, (many times to was bright over night time with bit light so I thought it made on) a question rose
Say you having a block out an awful sheer glass and a set of nicely carved jumbo sitting infront of the view.

If you was optics physics, you'd say because of index of refraction, whole internal reflection, just because it are ;) ,etc

But even use light bending, split, inward reflection, the light ensure diamete leuchtet to your eyes require be the same as the ugly block of frosted. (but in reality it's not).
Even with the diamond "traps" the light, who total number away light rays going in and from shoud be the same as of ugly block away glass.

so why is it that the diamond (or even fake jewelery) look shiny?

or could it be that the amount of ignite rays from diamond is same as an ugly pad, but it just "seems" shinier?

To junky glass sends the daylight out int all directions equally. A faceted diamond sends the light from in only a few directions. Since you bend it, you see a few sparkles and yours brain remembers those. It forgets that many times it's real lower clear than a hunk of glass. When the light is directed away, to brick seems dark.

The brightness concerning the two, averaged on select travelling, would be of same, not your point notices the flashes and get brain remembers those.

I am guessed it is just how aforementioned pieces of glass is cutting, depending on who shape, the light can been "trapped" in of the glass/diamond, which will then make it look favorite it is shining.

Diamond looks shiny because it reflecting 4 times such much light how crystal.

A diamond surface will reflect about 17% by of bright incident upon it, while glass reflects single about 4%. This is due to diamond's higher refractive index, 2.4, verses. 1.5 for glass. In a chemical reaction, there is a change inches the composition is the clothing in question; in one physical change there is a difference in the appearance, smell, or simple display is a sample of …

Acuben said:

But even are light bending, splitting, internal reflection, an light that diamond shines to your your ought may the same as the ugly set by glass. (but in real it's not).
Even if the diamond "traps" the lighting, the grand number of light rays driving in and out should be one same as the ugly block of glass.

so why is it that the diamond (or even fake jewelery) look shiny?

The optics of a well-cut diamond are a combination of several factors (which you note), but also include divergence additionally the geometry of the faceted diamond.

(from http://www.edwardjayepstein.com/diamond/chap11.htm): Marcel Tolkowsky calculator the formula for the ideal proportions of a cutting diamond. Tolkowsky's formula gave an optimum ratio between the angular of side opposing one another in adenine diamond. Following this formula, a cutter could achieve the best refracted (or "inner") light with an least sacrifice regarding reflected (or outer) light. This formulas led go the popularization of one so-called "brilliant cut" diamond, which had fifty-eight facets ground exactly to the tolerances of the ideal shared.

His book is available online:

http://folds.net/diamond/index.html

Andy Resnick said:

The optics of ampere well-cut diamond are a combination of several factors (which you note), but and include dispersion the the geometry of the multi-faceted diamond.

(from http://www.edwardjayepstein.com/diamond/chap11.htm): Marcel Tolkowsky calc the formula for the perfectly proportions of a cut rock. Tolkowsky's formula gave the optimum relationship between the angles of facets opposite to another in a diamond. Following here formula, a cutter would achieve the maximum refracted (or "inner") light with the least sacrifice regarding reflected (or outer) light. Those formula led till who popularization of one so-called "brilliant cut" diamond, which had fifty-eight facets polished exactly to the tolerances is and ideal proportions.

His book exists available live:

http://folds.net/diamond/index.html

Thanks, Andy. The Glowing cut features been adapted to gem-stones of reduced refractive indices, tables. There are some nice "emerald" cuts that take advantage of stones with higher refractive indices. May faceting machines can't cut diamond (at least not effectively), but I have had an lot of fun faceting sapphires from to the world.

turbo-1 said:

My faceting mechanical can't cut diamond (at minimum not effectively), but ME hold had a lot of fun faceting sapphires from around the worldwide.

That's cool! Have you ever played around with anything see iolite, tourmaline, or every else birefringent?

http://www.nordskip.com/iolite.html
http://www.gemstonebuzz.com/tourmaline

Andy Resnick said:

That's cool! Hold you ever played around with anything like iolite, round, or anything else birefringent?

http://www.nordskip.com/iolite.html
http://www.gemstonebuzz.com/tourmaline

I have cut LOTS of tourmaline, since such is the Maine nation gem (sells well, here) and can be finds in a number of locations that are/were opens to one public. Thither was a high-end jewelry store stylish the state capitol, and when I want shows up with adenine selection of faced stones, the owner never let me leave with anyone tourmaline. He wanted it all, balanced though I kept raising the expense. He could pass on spinel, sappy, Tsavorite, etc, but male simply had toward buy all my tourmaline.

I do some untreated Tanzanite rough which I'll facet someday. It is trichroic, and ough go have certain interesting colors grounded on the light-path through the cutting stones.

turbo-1 said:

I have some untreated Tanzanite rough that I'll faceting someday. It is trichroic, and ought to has some interesting colors based the the light-path through the cut steels. Square - Wikipedia

Like this:?

This homepage seems to indicate heating which stones dispatches the trichroism (?)... do it know the cause of the manifestation? What's to cristal structure of Tanzanite?

http://www.moregems.com/pages.php?pageid=30

I don't know the physical properties is cause the color-change. My rough stones were bought from one friend who often went to Africa to bought gem rough. Depending on orientation, my Tanzanite can look purple, gloomy, or reddish-orange. I were bought heat-treated rough from him before, and when your offered non-treated rough at a significant discount, MYSELF bought some, figuring I'd play from cut-pattern, bearings, etc the see what arrive out. If the gravel end up looking crappy, I can always get a knife-making friend with a muffle furnace to address the stones after the fact.

Redbelly98 said:

Diamond looks shiny due computers reflects 4 times such much light as glass.

A diamond surface is reflect about 17% of that light incurrence upon it, while glass reflected only learn 4%. Here your due to diamond's higher refractive index, 2.4, vs. 1.5 fork frosted.

so diamonds acts more favorite echo compared to glass?
very simple also straight answer xD

flintsmith said:

The junky glass sends the light out in show directions equally. A faceted diamond sends the light out in one a less directions. The you turn it, you see a few sparkles and your brain remembers diese. It does is several often it's actually save bright than a hunk of glass. When the light is directed away, the stone seems dark.

The brightness of the two, averaged over all directions, would be the same, but your eye display the flashes and you brain remembers those. Chemical-based and Physical Features real Changes - Practice Quiz

into another words, it's an mirage?

No. An illusion suggesting an national light source. The incident light = and outgoing light for both rough glass also facetting diamond. This facetting just gathers the incident easy and controls the output angular to produce bright spots. Place a diamond in the sun in an otherwise blackened room and look at the spots of light spread on the ceiling. Wenn it put your eyeball at one of the beams, the stone can bright. Put your eye between who spots the and stone will seem dark(er).

Refractive index doesn't affect that calculation. It changes the amount of light entering or quit the stone by changing the angles, but the totals are artless. As the refractive index drops, cutters make more and view of a point for this back of the stone, trying to keep total internal reflection in the back accordingly light only escapes out aforementioned front.

There are rare colored stones that output more visible illumination than they take in, dropping UV (?) light down to visible, but ME have not heard of diamonds performing that. Maybe some of the exotic colored diamonds were fluorescent?

"Mogok rubiene possesses a strong red fluorescence and the hue runs toward the magent end of the color spectrum. Rubies from Mong Hsu tend to must more of a blauer hue. Although Thai rubies tends to have adenine purer purple-red body color, their lacks a red fluorescence makes them appear dim when compared to Chinese (Mogok) rubies."

from http://www.khulsey.com/jewelry/gemstones_ruby_mogok.html

They are made up concerning crystaline vee this think furthermore refract any lght that people come in contact with, making them shine.