Definition & Suggestion

Dark and Refractory are synonymous respectively of:


- Matt (adj.), not reflecting light; not glossy

matt

[mat] 

adjective, noun, verb, mat·ted, mat·ting.

–adjective

1.

having a dull or lusterless surface: matte paint; a mattecomplexion; a photograph with a matte finish.

–noun

2.

a dull or dead surface, often slightly roughened, as onmetals, paint, paper, or glass.

3.

a tool for producing such a surface.

4.

Metallurgy . an unfinished metallic product of the smelting ofcertain sulfide ores, esp. those of copper.

5.

Movies . matte shot.

–verb (used with object)

6.

to finish with a matte surface.

Origin: 
1640–50;  < F mat  (masc.), matte  (fem.), OF < LL mattus moist, soft, weak, perh. < *maditus,  deriv. of L madēre  to bewet

- Reflective (adj.), Capable of or producing reflection: a reflective surface
re·flec·tive

  [ri-flek-tiv]

–adjective

1.

that reflects; reflecting.

2.

of or pertaining to reflection.

3.

cast by reflection.

4.

given to, marked by, or concerned with meditation ordeliberation: a reflective person.

Origin: 
1620–30; reflect  + -ive

—Related forms

re·flec·tive·ly, adverb

re·flec·tive·ness, re·flec·tiv·i·ty [ree-flek-tiv-i-tee] , noun

an·ti·re·flec·tive, adjective

an·ti·re·flec·tive·ly, adverb

an·ti·re·flec·tive·ness, noun

non·re·flec·tive, adjective

non·re·flec·tive·ly, adverb

non·re·flec·tive·ness, noun

o·ver·re·flec·tive, adjective

o·ver·re·flec·tive·ly, adverb

o·ver·re·flec·tive·ness, noun

self-re·flec·tive, adjective

—Synonyms 
4.  contemplative, thoughtful.