Powder X-ray diffraction can reveal for sure if a substance contains a crystalline fraction.

If the solid product consists of crystallites, i.e. grains with faceted surface, it is most likely crystalline. You could check that with an optical microscope.

Actually i want to know without using such methods

how can i know their properties

X-ray crystallographic analysis can assist quite well.

If you have access to a microscope with polarized light, most crystals are transparent to it. If it happens it is easy to see if the substance you have is a crystal, or an aggregateof microcrystals. Be aware that no every crystals behave this way. Some crystal systems turn the crystal opaque to the polarized light.

For the basic chemistry an easy way is to check the solubility in water. According to the Fajan rule of like dissolves like, crystalline species are usually soluble in water and amorphous one are insoluble.

Sorry H_T_Seema_Khan! Your answer is not correct :(. Being crystalline does not mean ionic or polar enough to be soluble in water.

I would definitely go for PXRD, that's the most straightforward way for checking the cristallinity and the presence of multiple phases and/or amorphous fractions. You cannot even think about avoiding the use diffraction, there is no alternative if you want to deal with materials such as organometallic complexes, coordination polymers, oxides and so on. Having access to a diffractometer is nowadays pretty easy, you can for sure find someone who can perform the analysis.

U can see first by using microscope

Best way is that you should go for the Transmission electron microscopy (ED)...If you will get spot pattern than its single crystals and if you will get ring pattern than its poly crystalline....no diffraction data for amorphous...

Powder X-Ray Diffraction

You can also try polarized light microscopy

Make use of porosimetric analysis to give you details of the surface and pores

Powder X-ray diffraction gives the idea about crystalline fraction. Or simply observe the compound in light, reflection gives the difference the type.

Powder X-ray diffraction techinque can be used to confirm. Microscopes with polarizers can also be used where the crystalline ones can easily be differentiated.

Powder X ray diffraction is the best way to know.

Using X-ray diffractometer, you can easily know if the sample is crystalline or amorphours

Why organometallic compounds XRD come amorphous ?

X-ray diffractometer, you can know about the crystalline or amorphous phase.

X ray diffraction is the best way to know and you can also conform from M.P,

crystalline compounds have sharp M.P