Hi,
Normally, we have applied Open Graph to product pages to determine the title, desc and Images properly when shared. This works perfectly on Facebook, but apprently Google refuses to grab the correct images.
The scheme.org must be applied to product page to fix this problem. If you follow these steps, everything will be good to go.
1- Open this PHP file:
/templates/flexible_stylemart/html/com_virtuemart/productdetails/default.php (or flexv2.php depends on whatever layout you use for product page)
2- Find this line:
<div id="FlexibleProductDetailsPage" class="productdetails-view" >
and replace it with this:
<div id="FlexibleProductDetailsPage" class="productdetails-view" itemscope itemtype="http://schema.org/Product">
3- Find this line:
<h2 class="FlexibleProductDetailProductName nomargin"><?php echo $this->product->product_name ?></h2>
and replace it with this:
<h2 class="FlexibleProductDetailProductName nomargin" itemprop="name"><?php echo $this->product->product_name ?></h2>
4- Find this line:
<p><?php echo $this->product->product_s_desc;?></p>
and replace it with this:
<p itemprop="description"><?php echo $this->product->product_s_desc;?></p>
5- Open this PHP file:
/templates/flexible_stylemart/html/com_virtuemart/productdetails/default_images.php (or default_imagesv2.php if you are using flexv2.php for product details page)
6-Find this line:
<img src="<?php echo JURI::root().$this->product->images[0]->file_url;?>" id="FlexibleMainImage" ....
and replace it with this:
<img src="<?php echo JURI::root().$this->product->images[0]->file_url;?>" itemprop="image" id="FlexibleMainImage" ...
After you applied these changes, Google Plus will start grabbing the pictures correctly.. In fact, this changes will improve your SEO in overall, on google.com search results.
For further microData implementing, you can apply the other itemprop parameters (such as; price, reviews, availability etc..) to see the available parameters; see this page:
schema.org/Product
And test your page via Google's Data Structure Test Tool:
developers.google.com/structured-data/testing-tool/
This implementation has been TESTED and CONFIRMED on the Live Demo of StyleMart, you can try it here:
demo.flexiblewebdesign.com/stylemart/index.php/mens/color-pop/sample-product-01-detail
Regards.