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Rare black alabaster - just arrived!
Predominantly pieces without sawn edges with only a few blemished edge layers. Very layered, cracks are possible. Black alabaster contains carbon and therefore has a slightly higher Mohs hardness than transparent white alabaster. The crystal structure is also somewhat finer and denser. White to grey veins may appear when polished.
TECHNICAL DETAILS
| Origin: Spain | Spain |
| Mohs hardness | 2 - 2,5 |
| Appearance | Dark, occasionally with white-transparent markings |
| Structure | homogeneous, semi-crystalline |
| Density | 2.3 kg/dm³ |
| Special features | Not weather-resistant |
There is no place in Spain where black alabaster is reliably and regularly mined. Occasionally, a small layer of this rare alabaster appears during ordinary earthworks. Black alabaster is therefore only temporarily available.
PROCESSING
Black alabaster is very easy and quick to machine. Machining avoids 'damage' to the stone, which results in white areas. For processing with chisels, we particularly recommend claw chisels and flat or lettering chisels with a forged steel mallet head in combination with a wooden mallet. This allows the stone to be worked gently. We do not recommend point chisels because the stone structure is destroyed too quickly and white spots appear when grinding and polishing. Rasps and files are also suitable for processing.
FURTHER INFORMATION
Alabaster is a crystalline form of the mineral gypsum. Alabaster is extracted by mining nodules of different sizes that are found in the ground. Depending on where they are found, not only the size of the nodules varies, but also the colouring of the alabaster. Iron oxide penetrating the stone from the outside can colour the stone pinkish to reddish, for example. In addition to transparent white, there is grey, light yellow, reddish, brown and almost black alabaster with white veins in some cases.
Stone is a natural product. We endeavour to reproduce the appearance of our sculptural stones as accurately as possible in the illustrations so that the character of the stone can be recognised. Ultimately, each stone is a unique piece and the appearance may differ accordingly from the illustration.
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Our bildhau stones are natural stones in individual shapes & sizes, the dimensions & weights of which we cannot specify exactly in advance. You can choose your stone from different weight categories, in which the maximum price for a stone of the respective category is indicated. The stone supplied will be individually weighed and charged at the price per kilo stated here. The price invoiced will be lower than the maximum price for the respective category.
It is important to us that you receive exactly the material you need for your project. If you are looking for a stone with more specific dimensions (e.g. elongated, approx. 30 cm), please let us know in the message field at the end of the order process. We will endeavour to find a suitable stone for you. On request, we will send you a photo in advance for inspection. We charge a service fee of 9.50 euros for this service, which will be shown on the invoice.
Larger stones and cut-to-size pieces are generally also available for many types of stone. Please contact us by e-mail or telephone for a binding quotation.
It is important to us that you receive exactly the material you need for your project. If you are looking for a stone with more specific dimensions (e.g. elongated, approx. 30 cm), please let us know in the message field at the end of the order process. We will endeavour to find a suitable stone for you. On request, we will send you a photo in advance for inspection. We charge a service fee of 9.50 euros for this service, which will be shown on the invoice.
Larger stones and cut-to-size pieces are generally also available for many types of stone. Please contact us by e-mail or telephone for a binding quotation.
Here you will find interesting information on calculating the weight of a sculptor's stone.
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Our bildhau stones are natural stones in individual shapes & sizes, the dimensions & weights of which we cannot specify exactly in advance. You can choose your stone from different weight categories, in which the maximum price for a stone of the respective category is indicated. The stone supplied will be individually weighed and charged at the price per kilo stated here. The price invoiced will be lower than the maximum price for the respective category.
It is important to us that you receive exactly the material you need for your project. If you are looking for a stone with more specific dimensions (e.g. elongated, approx. 30 cm), please let us know in the message field at the end of the order process. We will endeavour to find a suitable stone for you. On request, we will send you a photo in advance for inspection. We charge a service fee of 9.50 euros for this service, which will be shown on the invoice.
Larger stones and cut-to-size pieces are generally also available for many types of stone. Please contact us by e-mail or telephone for a binding quotation.
It is important to us that you receive exactly the material you need for your project. If you are looking for a stone with more specific dimensions (e.g. elongated, approx. 30 cm), please let us know in the message field at the end of the order process. We will endeavour to find a suitable stone for you. On request, we will send you a photo in advance for inspection. We charge a service fee of 9.50 euros for this service, which will be shown on the invoice.
Larger stones and cut-to-size pieces are generally also available for many types of stone. Please contact us by e-mail or telephone for a binding quotation.
Here you will find interesting information on calculating the weight of a sculptor's stone.