Selenite - Revision history

Editor at 08:54, 15 February 2023

2023-02-15T08:54:35Z

← Older revision		Revision as of 08:54, 15 February 2023
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−	[[File:~~Gypsum var Selenite public domain 800~~.jpg]]	+	[[File:Gypsum_var_Selenite_public_domain_800.jpg\|link=File:Gypsum_var_Selenite_public_domain_800.jpg]]

	Selenite is one of the three forms of pure natural crystalline gypsum, with one other, satin spar having a very similar features, the other natural form is gypsum rock which is commonly crushed and used in the manufacture of plaster products.		Selenite is one of the three forms of pure natural crystalline gypsum, with one other, satin spar having a very similar features, the other natural form is gypsum rock which is commonly crushed and used in the manufacture of plaster products.
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	In old English gypsum was referred to as spear stone (spærstn) because of its crystal spear-like projections, of which selenite and satin spar have the most notable. Selenite crystals are much rarer than satin spar crystals, whilst gypsum rock is relatively common. Other forms of crystalline gypsum are known as tabular gypsum, which is normally shorter blocks of satin spar, whilst desert roses, form with grains of sand and gypsum flower which are referred to as crystal habits.		In old English gypsum was referred to as spear stone (spærstn) because of its crystal spear-like projections, of which selenite and satin spar have the most notable. Selenite crystals are much rarer than satin spar crystals, whilst gypsum rock is relatively common. Other forms of crystalline gypsum are known as tabular gypsum, which is normally shorter blocks of satin spar, whilst desert roses, form with grains of sand and gypsum flower which are referred to as crystal habits.

−	Selenite crystals form in large flat, transparent crystals, often called plates or windows, whilst Satin Spar crystals are fibrous and white, often appear as raw rulers or wands which can be polished into palmstones or spheres. The naturally large flat transparent form of selenite crystals ~~were~~ put to use by the Romans in the construction of ~~specularums~~, which ~~were~~ the first types of windows before the development of glass, used to construct ~~roman~~ winter gardens for horticulture.	+	Selenite crystals form in large flat, transparent crystals, often called plates or windows, whilst Satin Spar crystals are fibrous and white, often appear as raw rulers or wands which can be polished into palmstones or spheres. The naturally large flat transparent form of selenite crystals, might also be called Lapis Specularis a form of selenite that was put to good use by the Romans in the construction of specularia (sometimes referred to as specularium), which included the first types of windows before the development of glass for use in glazing, it was used to construct Roman winter gardens for horticulture.

	= Related articles on Designing Buildings =		= Related articles on Designing Buildings =

Editor at 08:39, 15 February 2023

2023-02-15T08:39:07Z

← Older revision		Revision as of 08:39, 15 February 2023
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		+	[[File:Gypsum var Selenite public domain 800.jpg]]
		+
	Selenite is one of the three forms of pure natural crystalline gypsum, with one other, satin spar having a very similar features, the other natural form is gypsum rock which is commonly crushed and used in the manufacture of plaster products.		Selenite is one of the three forms of pure natural crystalline gypsum, with one other, satin spar having a very similar features, the other natural form is gypsum rock which is commonly crushed and used in the manufacture of plaster products.

Editor at 08:31, 15 February 2023

2023-02-15T08:31:31Z

← Older revision		Revision as of 08:31, 15 February 2023
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	Selenite crystals form in large flat, transparent crystals, often called plates or windows, whilst Satin Spar crystals are fibrous and white, often appear as raw rulers or wands which can be polished into palmstones or spheres. The naturally large flat transparent form of selenite crystals were put to use by the Romans in the construction of specularums, which were the first types of windows before the development of glass, used to construct roman winter gardens for horticulture.		Selenite crystals form in large flat, transparent crystals, often called plates or windows, whilst Satin Spar crystals are fibrous and white, often appear as raw rulers or wands which can be polished into palmstones or spheres. The naturally large flat transparent form of selenite crystals were put to use by the Romans in the construction of specularums, which were the first types of windows before the development of glass, used to construct roman winter gardens for horticulture.
		+
		+	= Related articles on Designing Buildings =
		+
		+	* Botanical gardens
		+	* Construction materials.
		+	* Conservatory.
		+	* Drywall construction.
		+	* Garden greenhouse.
		+	* Gypsum.
		+	* Hydroponics and buildings.
		+	* Lime plaster.
		+	* Minerals of local and national importance.
		+	* Mortar.
		+	* Permission for mining or working of minerals.
		+	* Plaster.
		+	* Specularium.
		+	* The secret life of the Georgian garden.
		+	* Types of glass.
		+	* Winter gardens.
		+
		+	[[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:Definitions]]

Editor at 08:20, 15 February 2023

2023-02-15T08:20:59Z

← Older revision		Revision as of 08:20, 15 February 2023
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−	~~Selinite~~ is one of the three forms of natural gypsum, with one other, satin spar having a very similar features, the other ~~rock~~ gypsum is commonly crushed and used in the manufacture of plaster products.	+	Selenite is one of the three forms of pure natural crystalline gypsum, with one other, satin spar having a very similar features, the other natural form is gypsum rock which is commonly crushed and used in the manufacture of plaster products.

−	In old English gypsum was referred to as spear stone (spærstn) because of its crystal spear-like projections, of which ~~selinite~~ and satin spar have the most notable. Selenite crystals are much rarer than satin spar crystals, whilst gypsum rock is relatively common. Ot	+	In old English gypsum was referred to as spear stone (spærstn) because of its crystal spear-like projections, of which selenite and satin spar have the most notable. Selenite crystals are much rarer than satin spar crystals, whilst gypsum rock is relatively common. Other forms of crystalline gypsum are known as tabular gypsum, which is normally shorter blocks of satin spar, whilst desert roses, form with grains of sand and gypsum flower which are referred to as crystal habits.

−	Selenite ~~crystal~~ form in large flat, transparent crystals, often called plates or windows, whilst ~~Satin Spar~~ Satin Spar crystals are fibrous and white, often ~~seen in little mountains,~~ as raw rulers or wands~~, or~~ polished into palmstones ~~and~~ spheres ~~with a~~	+	Selenite crystals form in large flat, transparent crystals, often called plates or windows, whilst Satin Spar crystals are fibrous and white, often appear as raw rulers or wands which can be polished into palmstones or spheres. The naturally large flat transparent form of selenite crystals were put to use by the Romans in the construction of specularums, which were the first types of windows before the development of glass, used to construct roman winter gardens for horticulture.
−		+
−	has fibre optic properties, which means light can pass through the crystal in a certain direction. If you take a section of Satin Spar, and polished the ends flat, then you will be able to see through it. Small polished sections are sometimes sold as “TV Rock” to show off this fibre optic property, although there is also a mineral called Ulexite which is also known as TV Rock for the same reason. The ~~former is better known but both~~ naturally form ~~as transparent materials which resemble glass~~ crystals ~~and indication is they~~ were ~~used~~ by the ~~romans~~ in the construction of specularums, ~~and~~ the first types of windows.	+

Editor: Created page with "Selinite is one of the three forms of natural gypsum, with one other, satin spar having a very similar features, the other rock gypsum is commonly crushed and used in the manufac..."

2023-02-15T08:00:56Z

Created page with "Selinite is one of the three forms of natural gypsum, with one other, satin spar having a very similar features, the other rock gypsum is commonly crushed and used in the manufac..."

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Selinite is one of the three forms of natural gypsum, with one other, satin spar having a very similar features, the other rock gypsum is commonly crushed and used in the manufacture of plaster products.

In old English gypsum was referred to as spear stone (spærstn) because of its crystal spear-like projections, of which selinite and satin spar have the most notable. Selenite crystals are much rarer than satin spar crystals, whilst gypsum rock is relatively common. Ot

Selenite crystal form in large flat, transparent crystals, often called plates or windows, whilst Satin Spar Satin Spar crystals are fibrous and white, often seen in little mountains, as raw rulers or wands, or polished into palmstones and spheres with a

has fibre optic properties, which means light can pass through the crystal in a certain direction. If you take a section of Satin Spar, and polished the ends flat, then you will be able to see through it. Small polished sections are sometimes sold as “TV Rock” to show off this fibre optic property, although there is also a mineral called Ulexite which is also known as TV Rock for the same reason. The former is better known but both naturally form as transparent materials which resemble glass crystals and indication is they were used by the romans in the construction of specularums, and the first types of windows.