Semi-Gems
The semi-gems are listed as follows-

All Semi -Gems
 

Citrine – This colours golden bright and is transparent. This is the semi-gem of Jupiter. Rossaries are made of this gem and also studded in rings and necklaces also.

Amethyst – This colours light violet, Shining and transparent. This is the semi-gem of Satirin Rossaries are made of this.

Rock Crystal – This colours white, shining and transparent. This is the semi-gem of Venus. It is used in rings, rosaries, idols and Shri Yantra.

Malachite – This colours green and light green linings. It is good to wear kidney pain, so it called as Kidney stone also.

Turquoise – This colours greenish blue and sky blue also. This is opaque and is a semi-gem for mercury.
Peridot – This is soft and colours green and is a semi-gem of mercury in the astrology.

Tourmaline – This is found in different colours but mostly in pink, green and blue. On the basis of its colour, It is used as a semi-gem of different planets.

Opal – This colours mostly white and occurs stains of different colours. This is a very soft gem and so is breakable. This is used in place of Diamond.

Gold Stone or Aventurine Quartz – This colour dark saffron and opaque and occurs golden lining-spots. It is used in rings, Darshan-Jodi and rosaries.

Zircon – This is called American Diamond also. This colours mostly white but some are of red and yellow colour also. It resembles diamond and studded in ornaments.

Fortification Agate – It colours dirty yellow and has yellow and has yellow zig-zag linings. It is good in piles.

Lapis Lazuli – This colours blue and has white. This is an important semi-gem of Saturn. It is used in studs, Rosaries and lockets etc.

Garnet – This colours blackish red. This is a semi-gem of Ruby. It is used in studs and rosaries.

Moon Stone – This is called Gau-danti also and is a semi-gem of pearl.

Gun Metal or Hematite - This is a shining black semi-gem and represents Saturn.

Load Stone – This is magnet-stone, colours shining black. This attracts iron-pieces and is useful in blood pressure.

Malanite or Andradite Earnet – This coloursblack and occurs a shining star on its surface. It represents Saturn.

Chatiyant Quartz or Tiger Eye – On its surface are present yellow and black shining belts, as a tiger has colours belts on its body. It is a semi-gem of Ketu and Jupiter. It is used in studs and rosaries.

Jade/ jadeite – This colours blue and green. It represents mercury and Saturn.

Onyx – This colours green or blue and represents Mercury and Saturn.

Agate – this colour different and has belts on surfaces. According to different colours it represents different rashes.

Sulemani Onyx – This colours black and has white belts on it.
Sardonyx – this colours dark red and is a good semi-gem for Mars.

Aquamarine – This colours light green and represents Emerald.

Smoky Quartz – this colours like smoke with golden touch.
Moss Agate - This has different colours and naturally has spots of flower and leaves on it.

Heliodor – This colours a mixture of green and white. It is said that it encourages the person and the wearer not is feared.
Alexandrite – This colours blue and violet.
Spinel Ruby – this colours pink as a rose flower.
Romni – This colours dark red with some blackish touch.
Spinel – This colours red with some yellowish touch.
A Kind or Marbel (Ludhia) – This colours dark red.
Pink Sapphire ( Goroup of Corundum) - this is a semi-gem of corundum and colours pink and white.
Sodalite – This is a called as KAKA NILI also. It colours blue and is a substitute of Blue Sapphire.
Blood Stone – This colours green and has red spots.
Bamboo Stone – this is soft and colours light green.
Door-E-Nazaf (Fllor Stone) – This colour like green paddy.
A Kind of Agate – This colours brown with black linings.
A Variety of Onyx – This colours brown and has cream colours liningh on it.
Sivar – This colours green and has brown linings.
A Kind of Zircon – This colours pinkish yellow.
Rhodonite – This colours pink and has big spots on its surface.
Abri – This colours black.
Kudrat – This colours black and spots of white and yellow colour.
Chatoyant – This colours black and has golden lines.
White Jade - This colour a mixture of white and grape-green colour
A kind of Marble-This is a semi-gem of Makrana-marble
Marble-This has different colours
Basanite-This colours ink-black and is used to check gold and silver
Braunite-This colours dark brown and tiny spots of yellow
A variety of Agate-This is a variety of agate and colours green with yellowish and is used in rosaries
Sand Stone- This colours pink. Its colours moving if we wave it by hand.
Move-Najaf (Floor Stone)- This colours white and has black linings.
Amber- This colours red and is used in rosaries.
Jharna- This colours muddy.
Sangbasari (A Kind of Antimony)- This is used in eye-surama.
Achroite- This is smooth, watery and colours white and green.
Spider Stone- This colours light black and has spider web on its surface.
Sangia (A Kind of Gypsum)- This is white and resembles Sailkhari.
Gudari (A Kind of Marble)- This colours yellow.
Amazonite- This colours a mixture of blue and green colour.
Kansala (A variety of Turmaline)- This colours whitish green.
Eye Agate- This colours black with some brownish touch.
Hawas- This colours green with some golden touch.
Mysore Star- This colours red with blackish touch and is a semi-gem of Ruby.

Dhedi (A kind of Marble)- This colours black and is used in making crucibles of different sizes.
Gauri (A Kind of Agate)- This has many colours with linings and is a hard stone.

Black Marbles- This is black and ios used in idols.
Prophyry – This colours red with yellowish and tiny spots of pink colour.
Jet – This colours white and muddy. It is used in cups and Kharal.
A Variety of Agate or Sard Pebble – This colours black with green.
A Variety of Marble – This colours pink with light black.
Epidote – This colours dark brown.
Tiliyar – This colours black with white spots.
Tektites – This colours black with some greenish touch.
A Kind of Soft Stones – This colours white.
Gypsum – This is a white, soft and smooth stone and is used in cosmetics-items.

Serpentine – This colours a mixture of white, green and black. This is used in snake-poisoning therapy.

Jasper – This has two colours red and blue. It is called Raat-Ratua also. This is useful in night-fever.
Marcasite – This colours muddy-white.
Mazrat-E-Ud – This is a black stone.
Antimony – This is a black soft stone and is used in surma.

 Philosophers Stone – This is a unavailable stone and it is said that iron converts in gold after touching it. There are many stories said about it.

Rainbo Quartz – This is a shining and white colour which stone scatters many colours in sun-light.
 

This way, we see that there are some semi-gems also which are not used in ornaments and are not useful in astrologically but are used in house – building, idols, medicines etc. but because these are listed in the category of semi-gems so are described here.
 
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